3656378980 has 12 divisors (see below), whose sum is σ = 7678395900. Its totient is φ = 1462551584.

The previous prime is 3656378941. The next prime is 3656378993. The reversal of 3656378980 is 898736563.

It can be written as a sum of positive squares in 2 ways, for example, as 2453815296 + 1202563684 = 49536^2 + 34678^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91409455 + ... + 91409494.

It is an arithmetic number, because the mean of its divisors is an integer number (639866325).

Almost surely, 2^3656378980 is an apocalyptic number.

It is an amenable number.

3656378980 is an abundant number, since it is smaller than the sum of its proper divisors (4022016920).

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

3656378980 is a wasteful number, since it uses less digits than its factorization.

3656378980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182818958 (or 182818956 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The square root of 3656378980 is about 60467.9996361712. Note that the first 3 decimals coincide. The cubic root of 3656378980 is about 1540.5781519547.

The spelling of 3656378980 in words is "three billion, six hundred fifty-six million, three hundred seventy-eight thousand, nine hundred eighty".