3690309681 has 12 divisors (see below), whose sum is σ = 5562206208. Its totient is φ = 2353240824.

The previous prime is 3690309677. The next prime is 3690309743. The reversal of 3690309681 is 1869030963.

It is not a de Polignac number, because 3690309681 - 2² = 3690309677 is a prime.

It is a super-2 number, since 2×3690309681² = 27236771083364643522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3690309641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8913585 + ... + 8913998.

It is an arithmetic number, because the mean of its divisors is an integer number (463517184).

Almost surely, 2^3690309681 is an apocalyptic number.

It is an amenable number.

3690309681 is a deficient number, since it is larger than the sum of its proper divisors (1871896527).

3690309681 is a wasteful number, since it uses less digits than its factorization.

3690309681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17827612 (or 17827609 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 3690309681 is about 60747.9191495478. The cubic root of 3690309681 is about 1545.3289386656.

The spelling of 3690309681 in words is "three billion, six hundred ninety million, three hundred nine thousand, six hundred eighty-one".