65625663144 has 16 divisors (see below), whose sum is σ = 164064157920. Its totient is φ = 21875221040.

The previous prime is 65625663139. The next prime is 65625663167. The reversal of 65625663144 is 44136652656.

It is a junction number, because it is equal to n+sod(n) for n = 65625663093 and 65625663102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1367201292 + ... + 1367201339.

It is an arithmetic number, because the mean of its divisors is an integer number (10254009870).

Almost surely, 2^65625663144 is an apocalyptic number.

It is an amenable number.

65625663144 is an abundant number, since it is smaller than the sum of its proper divisors (98438494776).

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

65625663144 is a wasteful number, since it uses less digits than its factorization.

65625663144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734402640 (or 2734402636 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 48.

It can be divided in two parts, 656256 and 63144, that added together give a triangular number (719400 = T₁₁₉₉).

The spelling of 65625663144 in words is "sixty-five billion, six hundred twenty-five million, six hundred sixty-three thousand, one hundred forty-four".