65940938160 has 40 divisors (see below), whose sum is σ = 204416909040. Its totient is φ = 17584250112.

The previous prime is 65940938143. The next prime is 65940938171. The reversal of 65940938160 is 6183904956.

It is a tau number, because it is divible by the number of its divisors (40).

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, 137376715 + ... + 137377194.

It is an arithmetic number, because the mean of its divisors is an integer number (5110422726).

Almost surely, 2^65940938160 is an apocalyptic number.

65940938160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65940938160 is an abundant number, since it is smaller than the sum of its proper divisors (138475970880).

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

65940938160 is a wasteful number, since it uses less digits than its factorization.

65940938160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274753925 (or 274753919 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 65940938160 in words is "sixty-five billion, nine hundred forty million, nine hundred thirty-eight thousand, one hundred sixty".