64621605125 has 64 divisors (see below), whose sum is σ = 100909905408. Its totient is φ = 40138560000.

The previous prime is 64621605107. The next prime is 64621605149. The reversal of 64621605125 is 52150612646.

It is a de Polignac number, because none of the positive numbers 2^k-64621605125 is a prime.

It is a super-3 number, since 3×64621605125³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2692679 + ... + 2716571.

It is an arithmetic number, because the mean of its divisors is an integer number (1576717272).

Almost surely, 2^64621605125 is an apocalyptic number.

It is an amenable number.

64621605125 is a deficient number, since it is larger than the sum of its proper divisors (36288300283).

64621605125 is a wasteful number, since it uses less digits than its factorization.

64621605125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24207 (or 24197 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 64621605125 in words is "sixty-four billion, six hundred twenty-one million, six hundred five thousand, one hundred twenty-five".