65432138988 has 12 divisors (see below), whose sum is σ = 152674991000. Its totient is φ = 21810712992.

The previous prime is 65432138971. The next prime is 65432138999. The reversal of 65432138988 is 88983123456.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2726339113 + ... + 2726339136.

Almost surely, 2^65432138988 is an apocalyptic number.

It is an amenable number.

65432138988 is an abundant number, since it is smaller than the sum of its proper divisors (87242852012).

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

65432138988 is a wasteful number, since it uses less digits than its factorization.

65432138988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452678256 (or 5452678254 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 57.

The spelling of 65432138988 in words is "sixty-five billion, four hundred thirty-two million, one hundred thirty-eight thousand, nine hundred eighty-eight".