655423402655 has 64 divisors (see below), whose sum is σ = 914901765120. Its totient is φ = 441490689024.

The previous prime is 655423402649. The next prime is 655423402687. The reversal of 655423402655 is 556204324556.

It is not a de Polignac number, because 655423402655 - 2¹⁴ = 655423386271 is a prime.

It is a super-2 number, since 2×655423402655² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 563562104 + ... + 563563266.

It is an arithmetic number, because the mean of its divisors is an integer number (14295340080).

Almost surely, 2^655423402655 is an apocalyptic number.

655423402655 is a deficient number, since it is larger than the sum of its proper divisors (259478362465).

655423402655 is a wasteful number, since it uses less digits than its factorization.

655423402655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288.

The product of its (nonzero) digits is 4320000, while the sum is 47.

The spelling of 655423402655 in words is "six hundred fifty-five billion, four hundred twenty-three million, four hundred two thousand, six hundred fifty-five".