3856618680 has 64 divisors (see below), whose sum is σ = 11586032640. Its totient is φ = 1026993792.

The previous prime is 3856618663. The next prime is 3856618681. The reversal of 3856618680 is 868166583.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3856618681) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 65137 + ... + 109343.

It is an arithmetic number, because the mean of its divisors is an integer number (181031760).

Almost surely, 2^3856618680 is an apocalyptic number.

3856618680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3856618680 is an abundant number, since it is smaller than the sum of its proper divisors (7729413960).

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

3856618680 is a wasteful number, since it uses less digits than its factorization.

3856618680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44948 (or 44944 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The square root of 3856618680 is about 62101.6801705075. The cubic root of 3856618680 is about 1568.2028308609.

The spelling of 3856618680 in words is "three billion, eight hundred fifty-six million, six hundred eighteen thousand, six hundred eighty".