42865544740864 has 60 divisors (see below), whose sum is σ = 85746971819124. Its totient is φ = 21428147585024.

The previous prime is 42865544740861. The next prime is 42865544740867. The reversal of 42865544740864 is 46804744556824.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42865544740861) and next prime (42865544740867).

It can be written as a sum of positive squares in 2 ways, for example, as 27388559294464 + 15476985446400 = 5233408^2 + 3934080^2 .

It is a super-2 number, since 2×42865544740864² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42865544740864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42865544740861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76282494 + ... + 76842370.

Almost surely, 2^{42865544740864} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42865544740864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42873485909562).

42865544740864 is an abundant number, since it is smaller than the sum of its proper divisors (42881427078260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42865544740864 is an frugal number, since it uses more digits than its factorization.

42865544740864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564578 (or 564552 counting only the distinct ones).

The product of its (nonzero) digits is 825753600, while the sum is 67.

The spelling of 42865544740864 in words is "forty-two trillion, eight hundred sixty-five billion, five hundred forty-four million, seven hundred forty thousand, eight hundred sixty-four".