2657863656 has 96 divisors (see below), whose sum is σ = 8277447360. Its totient is φ = 754707456.

The previous prime is 2657863631. The next prime is 2657863679. The reversal of 2657863656 is 6563687562.

It is a happy number.

2657863656 is a `hidden beast` number, since 2 + 6 + 578 + 6 + 3 + 65 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65976 + ... + 98328.

It is an arithmetic number, because the mean of its divisors is an integer number (86223410).

Almost surely, 2^2657863656 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 2657863656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4138723680).

2657863656 is an abundant number, since it is smaller than the sum of its proper divisors (5619583704).

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

2657863656 is a wasteful number, since it uses less digits than its factorization.

2657863656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32535 (or 32528 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The square root of 2657863656 is about 51554.4727060611. The cubic root of 2657863656 is about 1385.1949498590.

The spelling of 2657863656 in words is "two billion, six hundred fifty-seven million, eight hundred sixty-three thousand, six hundred fifty-six".