655624406 has 4 divisors (see below), whose sum is σ = 983436612. Its totient is φ = 327812202.

The previous prime is 655624381. The next prime is 655624433. The reversal of 655624406 is 604426556.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 655624406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163906100 + ... + 163906103.

It is an arithmetic number, because the mean of its divisors is an integer number (245859153).

Almost surely, 2^655624406 is an apocalyptic number.

655624406 is a deficient number, since it is larger than the sum of its proper divisors (327812206).

655624406 is a wasteful number, since it uses less digits than its factorization.

655624406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327812205.

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 655624406 is about 25605.1636589185. The cubic root of 655624406 is about 868.7304361069.

The spelling of 655624406 in words is "six hundred fifty-five million, six hundred twenty-four thousand, four hundred six".