3646636680 has 192 divisors, whose sum is σ = 11792926080. Its totient is φ = 901734400.

The previous prime is 3646636667. The next prime is 3646636691. The reversal of 3646636680 is 866366463.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2461540 + ... + 2463020.

It is an arithmetic number, because the mean of its divisors is an integer number (61421490).

Almost surely, 2^3646636680 is an apocalyptic number.

3646636680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3646636680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5896463040).

3646636680 is an abundant number, since it is smaller than the sum of its proper divisors (8146289400).

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

3646636680 is a wasteful number, since it uses less digits than its factorization.

3646636680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600 (or 1579 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 48.

The square root of 3646636680 is about 60387.3884184438. The cubic root of 3646636680 is about 1539.2086618566.

The spelling of 3646636680 in words is "three billion, six hundred forty-six million, six hundred thirty-six thousand, six hundred eighty".