3626991161 has 4 divisors (see below), whose sum is σ = 3638653824. Its totient is φ = 3615328500.

The previous prime is 3626991139. The next prime is 3626991163. The reversal of 3626991161 is 1611996263.

3626991161 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1611996263 = 257 ⋅6272359.

It is a cyclic number.

It is not a de Polignac number, because 3626991161 - 2²² = 3622796857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3626991163) 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 3 ways as a sum of consecutive naturals, for example, 5830865 + ... + 5831486.

It is an arithmetic number, because the mean of its divisors is an integer number (909663456).

Almost surely, 2^3626991161 is an apocalyptic number.

It is an amenable number.

3626991161 is a deficient number, since it is larger than the sum of its proper divisors (11662663).

3626991161 is a wasteful number, since it uses less digits than its factorization.

3626991161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11662662.

The product of its digits is 104976, while the sum is 44.

The square root of 3626991161 is about 60224.5063159508. The cubic root of 3626991161 is about 1536.4396246914.

The spelling of 3626991161 in words is "three billion, six hundred twenty-six million, nine hundred ninety-one thousand, one hundred sixty-one".