3656763640 has 32 divisors (see below), whose sum is σ = 8236546560. Its totient is φ = 1461136000.

The previous prime is 3656763611. The next prime is 3656763641. The reversal of 3656763640 is 463676563.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656763641) 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 7 ways as a sum of consecutive naturals, for example, 10936 + ... + 86215.

It is an arithmetic number, because the mean of its divisors is an integer number (257392080).

Almost surely, 2^3656763640 is an apocalyptic number.

It is an amenable number.

3656763640 is an abundant number, since it is smaller than the sum of its proper divisors (4579782920).

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

3656763640 is a wasteful number, since it uses less digits than its factorization.

3656763640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98103 (or 98099 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 46.

The square root of 3656763640 is about 60471.1802431538. The cubic root of 3656763640 is about 1540.6321742552.

The spelling of 3656763640 in words is "three billion, six hundred fifty-six million, seven hundred sixty-three thousand, six hundred forty".