3656678904 has 160 divisors (see below), whose sum is σ = 10938787200. Its totient is φ = 1138717440.

The previous prime is 3656678891. The next prime is 3656678951. The reversal of 3656678904 is 4098766563.

3656678904 is a `hidden beast` number, since 3 + 6 + 566 + 78 + 9 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 579414 + ... + 585690.

It is an arithmetic number, because the mean of its divisors is an integer number (68367420).

Almost surely, 2^3656678904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3656678904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5469393600).

3656678904 is an abundant number, since it is smaller than the sum of its proper divisors (7282108296).

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

3656678904 is a wasteful number, since it uses less digits than its factorization.

3656678904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6355 (or 6342 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The square root of 3656678904 is about 60470.4796078219. The cubic root of 3656678904 is about 1540.6202741135.

The spelling of 3656678904 in words is "three billion, six hundred fifty-six million, six hundred seventy-eight thousand, nine hundred four".