65504365640 has 32 divisors (see below), whose sum is σ = 168439798080. Its totient is φ = 22458639552.

The previous prime is 65504365637. The next prime is 65504365727. The reversal of 65504365640 is 4656340556.

It is a junction number, because it is equal to n+sod(n) for n = 65504365591 and 65504365600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116971802 + ... + 116972361.

It is an arithmetic number, because the mean of its divisors is an integer number (5263743690).

Almost surely, 2^65504365640 is an apocalyptic number.

It is an amenable number.

65504365640 is an abundant number, since it is smaller than the sum of its proper divisors (102935432440).

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

65504365640 is a wasteful number, since it uses less digits than its factorization.

65504365640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233944181 (or 233944177 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 65504365640 in words is "sixty-five billion, five hundred four million, three hundred sixty-five thousand, six hundred forty".