623165556 has 48 divisors (see below), whose sum is σ = 1581447168. Its totient is φ = 189840000.

The previous prime is 623165537. The next prime is 623165597. The reversal of 623165556 is 655561326.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4020 + ... + 35531.

It is an arithmetic number, because the mean of its divisors is an integer number (32946816).

Almost surely, 2^623165556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623165556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790723584).

623165556 is an abundant number, since it is smaller than the sum of its proper divisors (958281612).

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

623165556 is a wasteful number, since it uses less digits than its factorization.

623165556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39672 (or 39670 counting only the distinct ones).

The product of its digits is 162000, while the sum is 39.

The square root of 623165556 is about 24963.2841589403. The cubic root of 623165556 is about 854.1506589023.

The spelling of 623165556 in words is "six hundred twenty-three million, one hundred sixty-five thousand, five hundred fifty-six".