623556655326 has 32 divisors (see below), whose sum is σ = 1511652499200. Its totient is φ = 188956562040.

The previous prime is 623556655297. The next prime is 623556655361.

623556655326 is a `hidden beast` number, since 6 + 2 + 3 + 5 + 5 + 66 + 553 + 26 = 666.

623556655326 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 524878746 + ... + 524879933.

It is an arithmetic number, because the mean of its divisors is an integer number (47239140600).

Almost surely, 2^623556655326 is an apocalyptic number.

623556655326 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

623556655326 is an abundant number, since it is smaller than the sum of its proper divisors (888095843874).

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

623556655326 is a wasteful number, since it uses less digits than its factorization.

623556655326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049758701 (or 1049758695 counting only the distinct ones).

The product of its digits is 29160000, while the sum is 54.

The spelling of 623556655326 in words is "six hundred twenty-three billion, five hundred fifty-six million, six hundred fifty-five thousand, three hundred twenty-six".