42645761280 has 432 divisors, whose sum is σ = 154118450304. Its totient is φ = 11290337280.

The previous prime is 42645761237. The next prime is 42645761311. The reversal of 42645761280 is 8216754624.

42645761280 is a `hidden beast` number, since 4 + 2 + 64 + 576 + 12 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 51943270 + ... + 51944090.

It is an arithmetic number, because the mean of its divisors is an integer number (356755672).

Almost surely, 2^42645761280 is an apocalyptic number.

42645761280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42645761280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77059225152).

42645761280 is an abundant number, since it is smaller than the sum of its proper divisors (111472689024).

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

42645761280 is an equidigital number, since it uses as much as digits as its factorization.

42645761280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 42645761280 in words is "forty-two billion, six hundred forty-five million, seven hundred sixty-one thousand, two hundred eighty".