3861255656 has 8 divisors (see below), whose sum is σ = 7239854370. Its totient is φ = 1930627824.

The previous prime is 3861255569. The next prime is 3861255659. The reversal of 3861255656 is 6565521683.

It can be written as a sum of positive squares in only one way, i.e., 3786433156 + 74822500 = 61534^2 + 8650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 3861255656.

It is not an unprimeable number, because it can be changed into a prime (3861255659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 241328471 + ... + 241328486.

Almost surely, 2^3861255656 is an apocalyptic number.

It is an amenable number.

3861255656 is a deficient number, since it is larger than the sum of its proper divisors (3378598714).

3861255656 is a wasteful number, since it uses less digits than its factorization.

3861255656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482656963 (or 482656959 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 47.

The square root of 3861255656 is about 62139.0026955696. The cubic root of 3861255656 is about 1568.8310846995.

The spelling of 3861255656 in words is "three billion, eight hundred sixty-one million, two hundred fifty-five thousand, six hundred fifty-six".