3656041389 has 288 divisors, whose sum is σ = 7892951040. Its totient is φ = 1576972800.

The previous prime is 3656041379. The next prime is 3656041391. The reversal of 3656041389 is 9831406563.

3656041389 is a `hidden beast` number, since 3 + 6 + 5 + 604 + 1 + 38 + 9 = 666.

It is not a de Polignac number, because 3656041389 - 2⁵ = 3656041357 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656041309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 68981887 + ... + 68981939.

It is an arithmetic number, because the mean of its divisors is an integer number (27406080).

Almost surely, 2^3656041389 is an apocalyptic number.

3656041389 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3656041389 is an abundant number, since it is smaller than the sum of its proper divisors (4236909651).

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

3656041389 is a wasteful number, since it uses less digits than its factorization.

3656041389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 3656041389 is about 60465.2080869652. The cubic root of 3656041389 is about 1540.5307369822.

The spelling of 3656041389 in words is "three billion, six hundred fifty-six million, forty-one thousand, three hundred eighty-nine".