3556856680 has 32 divisors (see below), whose sum is σ = 8618538600. Its totient is φ = 1313300736.

The previous prime is 3556856663. The next prime is 3556856701. The reversal of 3556856680 is 866586553.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1580698564 + 1976158116 = 39758^2 + 44454^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3419535 + ... + 3420574.

Almost surely, 2^3556856680 is an apocalyptic number.

It is an amenable number.

3556856680 is an abundant number, since it is smaller than the sum of its proper divisors (5061681920).

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

3556856680 is a wasteful number, since it uses less digits than its factorization.

3556856680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840133 (or 6840129 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 52.

The square root of 3556856680 is about 59639.3886621920. The cubic root of 3556856680 is about 1526.4718109928.

The spelling of 3556856680 in words is "three billion, five hundred fifty-six million, eight hundred fifty-six thousand, six hundred eighty".