3656815072 has 24 divisors (see below), whose sum is σ = 7352535456. Its totient is φ = 1789504512.

The previous prime is 3656815009. The next prime is 3656815081. The reversal of 3656815072 is 2705186563.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214193 + ... + 1217200.

It is an arithmetic number, because the mean of its divisors is an integer number (306355644).

Almost surely, 2^3656815072 is an apocalyptic number.

3656815072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3656815072 is an abundant number, since it is smaller than the sum of its proper divisors (3695720384).

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

3656815072 is a wasteful number, since it uses less digits than its factorization.

3656815072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431450 (or 2431442 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 3656815072 is about 60471.6055020867. The cubic root of 3656815072 is about 1540.6393971650.

The spelling of 3656815072 in words is "three billion, six hundred fifty-six million, eight hundred fifteen thousand, seventy-two".