3640243356 has 60 divisors (see below), whose sum is σ = 9522651600. Its totient is φ = 1212606720.

The previous prime is 3640243319. The next prime is 3640243363. The reversal of 3640243356 is 6533420463.

3640243356 is a `hidden beast` number, since 3 + 64 + 0 + 243 + 356 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3640243356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 671545 + ... + 676943.

It is an arithmetic number, because the mean of its divisors is an integer number (158710860).

Almost surely, 2^3640243356 is an apocalyptic number.

3640243356 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3640243356 is an abundant number, since it is smaller than the sum of its proper divisors (5882408244).

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

3640243356 is a wasteful number, since it uses less digits than its factorization.

3640243356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7496 (or 7485 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 36.

The square root of 3640243356 is about 60334.4292754974. The cubic root of 3640243356 is about 1538.3086164112.

The spelling of 3640243356 in words is "three billion, six hundred forty million, two hundred forty-three thousand, three hundred fifty-six".