64915506 has 24 divisors (see below), whose sum is σ = 145860624. Its totient is φ = 21638340.

The previous prime is 64915493. The next prime is 64915531. The reversal of 64915506 is 60551946.

64915506 is a `hidden beast` number, since 64 + 91 + 5 + 506 = 666.

64915506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66300 + ... + 67271.

It is an arithmetic number, because the mean of its divisors is an integer number (6077526).

Almost surely, 2^64915506 is an apocalyptic number.

64915506 is an abundant number, since it is smaller than the sum of its proper divisors (80945118).

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

64915506 is a wasteful number, since it uses less digits than its factorization.

64915506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133588 (or 133576 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 64915506 is about 8057.0159488486. The cubic root of 64915506 is about 401.8982812367.

The spelling of 64915506 in words is "sixty-four million, nine hundred fifteen thousand, five hundred six".