53438637664 has 24 divisors (see below), whose sum is σ = 106474881240. Its totient is φ = 26397398016.

The previous prime is 53438637661. The next prime is 53438637671. The reversal of 53438637664 is 46673683435.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53438637661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10057329 + ... + 10062640.

It is an arithmetic number, because the mean of its divisors is an integer number (4436453385).

Almost surely, 2^53438637664 is an apocalyptic number.

It is an amenable number.

53438637664 is a deficient number, since it is larger than the sum of its proper divisors (53036243576).

53438637664 is a wasteful number, since it uses less digits than its factorization.

53438637664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20120062 (or 20120054 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 55.

The spelling of 53438637664 in words is "fifty-three billion, four hundred thirty-eight million, six hundred thirty-seven thousand, six hundred sixty-four".