53688509664 has 24 divisors (see below), whose sum is σ = 140932338120. Its totient is φ = 17896169856.

The previous prime is 53688509657. The next prime is 53688509671. The reversal of 53688509664 is 46690588635.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53688509657) and next prime (53688509671).

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 53688509598 and 53688509607.

It is a congruent number.

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, 279627559 + ... + 279627750.

It is an arithmetic number, because the mean of its divisors is an integer number (5872180755).

Almost surely, 2^53688509664 is an apocalyptic number.

It is an amenable number.

53688509664 is an abundant number, since it is smaller than the sum of its proper divisors (87243828456).

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

53688509664 is a wasteful number, since it uses less digits than its factorization.

53688509664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559255322 (or 559255314 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 60.

The spelling of 53688509664 in words is "fifty-three billion, six hundred eighty-eight million, five hundred nine thousand, six hundred sixty-four".