3657639012 has 96 divisors (see below), whose sum is σ = 9279244800. Its totient is φ = 1117089792.

The previous prime is 3657638951. The next prime is 3657639047. The reversal of 3657639012 is 2109367563.

It is a super-2 number, since 2×3657639012² = 26756646284208672288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1174914 + ... + 1178022.

It is an arithmetic number, because the mean of its divisors is an integer number (96658800).

Almost surely, 2^3657639012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3657639012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4639622400).

3657639012 is an abundant number, since it is smaller than the sum of its proper divisors (5621605788).

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

3657639012 is a wasteful number, since it uses less digits than its factorization.

3657639012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285 (or 3283 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 3657639012 is about 60478.4177372391. The cubic root of 3657639012 is about 1540.7550988593.

The spelling of 3657639012 in words is "three billion, six hundred fifty-seven million, six hundred thirty-nine thousand, twelve".