2389618656 has 72 divisors (see below), whose sum is σ = 6979170744. Its totient is φ = 775008000.

The previous prime is 2389618607. The next prime is 2389618681. The reversal of 2389618656 is 6568169832.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×2389618656² = 11420554642206492672, which 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 11 ways as a sum of consecutive naturals, for example, 101470 + ... + 122781.

It is an arithmetic number, because the mean of its divisors is an integer number (96932927).

Almost surely, 2^2389618656 is an apocalyptic number.

It is an amenable number.

2389618656 is an abundant number, since it is smaller than the sum of its proper divisors (4589552088).

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

2389618656 is a wasteful number, since it uses less digits than its factorization.

2389618656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224304 (or 224293 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 2389618656 is about 48883.7258809105. The cubic root of 2389618656 is about 1336.9326617719.

The spelling of 2389618656 in words is "two billion, three hundred eighty-nine million, six hundred eighteen thousand, six hundred fifty-six".