64633506 has 16 divisors (see below), whose sum is σ = 147733824. Its totient is φ = 18466704.

The previous prime is 64633453. The next prime is 64633529. The reversal of 64633506 is 60533646.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769405 + ... + 769488.

It is an arithmetic number, because the mean of its divisors is an integer number (9233364).

Almost surely, 2^64633506 is an apocalyptic number.

64633506 is an abundant number, since it is smaller than the sum of its proper divisors (83100318).

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

64633506 is a wasteful number, since it uses less digits than its factorization.

64633506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538905.

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 64633506 is about 8039.4966260332. The cubic root of 64633506 is about 401.3154732495.

The spelling of 64633506 in words is "sixty-four million, six hundred thirty-three thousand, five hundred six".