64155525 has 24 divisors (see below), whose sum is σ = 121224384. Its totient is φ = 29328000.

The previous prime is 64155491. The next prime is 64155551. The reversal of 64155525 is 52555146.

It is not a de Polignac number, because 64155525 - 2⁷ = 64155397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60576 + ... + 61625.

It is an arithmetic number, because the mean of its divisors is an integer number (5051016).

Almost surely, 2^64155525 is an apocalyptic number.

It is an amenable number.

64155525 is a deficient number, since it is larger than the sum of its proper divisors (57068859).

64155525 is a wasteful number, since it uses less digits than its factorization.

64155525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122221 (or 122216 counting only the distinct ones).

The product of its digits is 30000, while the sum is 33.

The square root of 64155525 is about 8009.7144143846. The cubic root of 64155525 is about 400.3237483135.

The spelling of 64155525 in words is "sixty-four million, one hundred fifty-five thousand, five hundred twenty-five".