865401093536 has 48 divisors (see below), whose sum is σ = 1947228119424. Its totient is φ = 370871771904.

The previous prime is 865401093533. The next prime is 865401093629. The reversal of 865401093536 is 635390104568.

It is a happy number.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (865401093533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7329626 + ... + 7446758.

It is an arithmetic number, because the mean of its divisors is an integer number (40567252488).

Almost surely, 2^865401093536 is an apocalyptic number.

It is an amenable number.

865401093536 is an abundant number, since it is smaller than the sum of its proper divisors (1081827025888).

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

865401093536 is a wasteful number, since it uses less digits than its factorization.

865401093536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150133 (or 150125 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 865401093536 in words is "eight hundred sixty-five billion, four hundred one million, ninety-three thousand, five hundred thirty-six".