3656635161 has 16 divisors (see below), whose sum is σ = 4990799616. Its totient is φ = 2380157136.

The previous prime is 3656635133. The next prime is 3656635211. The reversal of 3656635161 is 1615366563.

It is not a de Polignac number, because 3656635161 - 2⁹ = 3656634649 is a prime.

It is a super-2 number, since 2×3656635161² = 26741961401322991842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3656635261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575146 + ... + 581468.

It is an arithmetic number, because the mean of its divisors is an integer number (311924976).

Almost surely, 2^3656635161 is an apocalyptic number.

It is an amenable number.

3656635161 is a deficient number, since it is larger than the sum of its proper divisors (1334164455).

3656635161 is a wasteful number, since it uses less digits than its factorization.

3656635161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10852.

The product of its digits is 291600, while the sum is 42.

The square root of 3656635161 is about 60470.1179178609. The cubic root of 3656635161 is about 1540.6141308687.

The spelling of 3656635161 in words is "three billion, six hundred fifty-six million, six hundred thirty-five thousand, one hundred sixty-one".