65311576440 has 64 divisors (see below), whose sum is σ = 213746981760. Its totient is φ = 15833109120.

The previous prime is 65311576403. The next prime is 65311576469. The reversal of 65311576440 is 4467511356.

It is a junction number, because it is equal to n+sod(n) for n = 65311576392 and 65311576401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24737914 + ... + 24740553.

It is an arithmetic number, because the mean of its divisors is an integer number (3339796590).

Almost surely, 2^65311576440 is an apocalyptic number.

65311576440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65311576440 is an abundant number, since it is smaller than the sum of its proper divisors (148435405320).

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

65311576440 is a wasteful number, since it uses less digits than its factorization.

65311576440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49478492 (or 49478488 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 65311576440 in words is "sixty-five billion, three hundred eleven million, five hundred seventy-six thousand, four hundred forty".