3656378979 has 48 divisors (see below), whose sum is σ = 6045232128. Its totient is φ = 2109240000.

The previous prime is 3656378941. The next prime is 3656378993. The reversal of 3656378979 is 9798736563.

It is not a de Polignac number, because 3656378979 - 2⁷ = 3656378851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3656378939) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 177444 + ... + 196974.

It is an arithmetic number, because the mean of its divisors is an integer number (125942336).

Almost surely, 2^3656378979 is an apocalyptic number.

3656378979 is a deficient number, since it is larger than the sum of its proper divisors (2388853149).

3656378979 is a wasteful number, since it uses less digits than its factorization.

3656378979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19640 (or 19637 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 63.

The square root of 3656378979 is about 60467.9996279024. Note that the first 3 decimals coincide. The cubic root of 3656378979 is about 1540.5781518142.

The spelling of 3656378979 in words is "three billion, six hundred fifty-six million, three hundred seventy-eight thousand, nine hundred seventy-nine".