3645909660 has 48 divisors (see below), whose sum is σ = 10220658336. Its totient is φ = 971089152.

The previous prime is 3645909637. The next prime is 3645909679. The reversal of 3645909660 is 669095463.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15562 + ... + 86798.

It is an arithmetic number, because the mean of its divisors is an integer number (212930382).

Almost surely, 2^3645909660 is an apocalyptic number.

3645909660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3645909660 is an abundant number, since it is smaller than the sum of its proper divisors (6574748676).

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

3645909660 is a wasteful number, since it uses less digits than its factorization.

3645909660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72102 (or 72100 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 48.

The square root of 3645909660 is about 60381.3684839951. The cubic root of 3645909660 is about 1539.1063657818.

The spelling of 3645909660 in words is "three billion, six hundred forty-five million, nine hundred nine thousand, six hundred sixty".