65644879160 has 512 divisors, whose sum is σ = 195030374400. Its totient is φ = 19349176320.

The previous prime is 65644879147. The next prime is 65644879187. The reversal of 65644879160 is 6197844656.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a junction number, because it is equal to n+sod(n) for n = 65644879096 and 65644879105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 402729239 + ... + 402729401.

It is an arithmetic number, because the mean of its divisors is an integer number (380918700).

Almost surely, 2^65644879160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65644879160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97515187200).

65644879160 is an abundant number, since it is smaller than the sum of its proper divisors (129385495240).

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

65644879160 is a wasteful number, since it uses less digits than its factorization.

65644879160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 65644879160 in words is "sixty-five billion, six hundred forty-four million, eight hundred seventy-nine thousand, one hundred sixty".