42865544740865 has 32 divisors (see below), whose sum is σ = 64139184958464. Its totient is φ = 26718096680640.

The previous prime is 42865544740861. The next prime is 42865544740867. The reversal of 42865544740865 is 56804744556824.

It is a happy number.

It is not a de Polignac number, because 42865544740865 - 2² = 42865544740861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42865544740795 and 42865544740804.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3696539 + ... + 9969728.

It is an arithmetic number, because the mean of its divisors is an integer number (2004349529952).

Almost surely, 2^{42865544740865} is an apocalyptic number.

It is an amenable number.

42865544740865 is a deficient number, since it is larger than the sum of its proper divisors (21273640217599).

42865544740865 is a wasteful number, since it uses less digits than its factorization.

42865544740865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13674437.

The product of its (nonzero) digits is 1032192000, while the sum is 68.

The spelling of 42865544740865 in words is "forty-two trillion, eight hundred sixty-five billion, five hundred forty-four million, seven hundred forty thousand, eight hundred sixty-five".