64630555 has 16 divisors (see below), whose sum is σ = 86673888. Its totient is φ = 45856000.

The previous prime is 64630541. The next prime is 64630603. The reversal of 64630555 is 55503646.

It is not a de Polignac number, because 64630555 - 2⁹ = 64630043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64630555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12076 + ... + 16585.

It is an arithmetic number, because the mean of its divisors is an integer number (5417118).

Almost surely, 2^64630555 is an apocalyptic number.

64630555 is a deficient number, since it is larger than the sum of its proper divisors (22043333).

64630555 is a wasteful number, since it uses less digits than its factorization.

64630555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28718.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 64630555 is about 8039.3130925471. The cubic root of 64630555 is about 401.3093654784.

The spelling of 64630555 in words is "sixty-four million, six hundred thirty thousand, five hundred fifty-five".