64553218465725 has 48 divisors (see below), whose sum is σ = 129367258031040. Its totient is φ = 31298530161600.

The previous prime is 64553218465643. The next prime is 64553218465793. The reversal of 64553218465725 is 52756481235546.

64553218465725 is a `hidden beast` number, since 6 + 4 + 5 + 5 + 3 + 2 + 18 + 46 + 572 + 5 = 666.

It is not a de Polignac number, because 64553218465725 - 2⁸ = 64553218465469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4347010654 + ... + 4347025503.

It is an arithmetic number, because the mean of its divisors is an integer number (2695151208980).

Almost surely, 2^{64553218465725} is an apocalyptic number.

It is an amenable number.

64553218465725 is an abundant number, since it is smaller than the sum of its proper divisors (64814039565315).

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

64553218465725 is a wasteful number, since it uses less digits than its factorization.

64553218465725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8694036187 (or 8694036176 counting only the distinct ones).

The product of its digits is 241920000, while the sum is 63.

The spelling of 64553218465725 in words is "sixty-four trillion, five hundred fifty-three billion, two hundred eighteen million, four hundred sixty-five thousand, seven hundred twenty-five".