65172431648 has 24 divisors (see below), whose sum is σ = 128428318620. Its totient is φ = 32555715840.

The previous prime is 65172431629. The next prime is 65172431669. The reversal of 65172431648 is 84613427156.

It can be written as a sum of positive squares in 2 ways, for example, as 65161751824 + 10679824 = 255268^2 + 3268^2 .

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, 918383 + ... + 986798.

Almost surely, 2^65172431648 is an apocalyptic number.

It is an amenable number.

65172431648 is a deficient number, since it is larger than the sum of its proper divisors (63255886972).

65172431648 is a wasteful number, since it uses less digits than its factorization.

65172431648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906260 (or 1906252 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The spelling of 65172431648 in words is "sixty-five billion, one hundred seventy-two million, four hundred thirty-one thousand, six hundred forty-eight".