623522655 has 24 divisors (see below), whose sum is σ = 1235169312. Its totient is φ = 285038784.

The previous prime is 623522611. The next prime is 623522657. The reversal of 623522655 is 556225326.

623522655 is a `hidden beast` number, since 623 + 5 + 2 + 26 + 5 + 5 = 666.

It is not a de Polignac number, because 623522655 - 2⁷ = 623522527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623522657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 989404 + ... + 990033.

It is an arithmetic number, because the mean of its divisors is an integer number (51465388).

Almost surely, 2^623522655 is an apocalyptic number.

623522655 is a deficient number, since it is larger than the sum of its proper divisors (611646657).

623522655 is a wasteful number, since it uses less digits than its factorization.

623522655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979455 (or 1979452 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 623522655 is about 24970.4356189475. The cubic root of 623522655 is about 854.3137820080.

The spelling of 623522655 in words is "six hundred twenty-three million, five hundred twenty-two thousand, six hundred fifty-five".