65421172927 has 32 divisors (see below), whose sum is σ = 75025612800. Its totient is φ = 56505103200.

The previous prime is 65421172897. The next prime is 65421172931. The reversal of 65421172927 is 72927112456.

It is a cyclic number.

It is not a de Polignac number, because 65421172927 - 2²⁷ = 65286955199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65421172127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4815298 + ... + 4828864.

It is an arithmetic number, because the mean of its divisors is an integer number (2344550400).

Almost surely, 2^65421172927 is an apocalyptic number.

65421172927 is a deficient number, since it is larger than the sum of its proper divisors (9604439873).

65421172927 is a wasteful number, since it uses less digits than its factorization.

65421172927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13867.

The product of its digits is 423360, while the sum is 46.

The spelling of 65421172927 in words is "sixty-five billion, four hundred twenty-one million, one hundred seventy-two thousand, nine hundred twenty-seven".