1623643056 has 100 divisors (see below), whose sum is σ = 5370651792. Its totient is φ = 463895424.

The previous prime is 1623643013. The next prime is 1623643069. The reversal of 1623643056 is 6503463261.

1623643056 is a `hidden beast` number, since 1 + 6 + 2 + 3 + 643 + 0 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1623643056.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80415 + ... + 98558.

Almost surely, 2^1623643056 is an apocalyptic number.

1623643056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1623643056 is an abundant number, since it is smaller than the sum of its proper divisors (3747008736).

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

1623643056 is a wasteful number, since it uses less digits than its factorization.

1623643056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179000 (or 178985 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 1623643056 is about 40294.4544075236. The cubic root of 1623643056 is about 1175.3400086796.

The spelling of 1623643056 in words is "one billion, six hundred twenty-three million, six hundred forty-three thousand, fifty-six".