3646203660 has 120 divisors (see below), whose sum is σ = 12478180176. Its totient is φ = 883923840.

The previous prime is 3646203641. The next prime is 3646203661. The reversal of 3646203660 is 663026463.

3646203660 is a `hidden beast` number, since 3 + 646 + 2 + 0 + 3 + 6 + 6 + 0 = 666.

It is a super-2 number, since 2×3646203660² = 26589602260394791200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (3646203661) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 84487 + ... + 120126.

Almost surely, 2^3646203660 is an apocalyptic number.

3646203660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3646203660 is an abundant number, since it is smaller than the sum of its proper divisors (8831976516).

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

3646203660 is a wasteful number, since it uses less digits than its factorization.

3646203660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204645 (or 204634 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 3646203660 is about 60383.8029607278. The cubic root of 3646203660 is about 1539.1477349828.

The spelling of 3646203660 in words is "three billion, six hundred forty-six million, two hundred three thousand, six hundred sixty".