65504026840 has 64 divisors (see below), whose sum is σ = 177304147200. Its totient is φ = 21276494208.

The previous prime is 65504026829. The next prime is 65504026843. The reversal of 65504026840 is 4862040556.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 65504026793 and 65504026802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65504026843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6151074 + ... + 6161713.

It is an arithmetic number, because the mean of its divisors is an integer number (2770377300).

Almost surely, 2^65504026840 is an apocalyptic number.

It is an amenable number.

65504026840 is an abundant number, since it is smaller than the sum of its proper divisors (111800120360).

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

65504026840 is a wasteful number, since it uses less digits than its factorization.

65504026840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12312824 (or 12312820 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 65504026840 in words is "sixty-five billion, five hundred four million, twenty-six thousand, eight hundred forty".