3655731161 has 2 divisors, whose sum is σ = 3655731162. Its totient is φ = 3655731160.

The previous prime is 3655731137. The next prime is 3655731173. The reversal of 3655731161 is 1611375563.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3183103561 + 472627600 = 56419^2 + 21740^2 .

It is a cyclic number.

It is not a de Polignac number, because 3655731161 - 2²² = 3651536857 is a prime.

It is not a weakly prime, because it can be changed into another prime (3655731181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1827865580 + 1827865581.

It is an arithmetic number, because the mean of its divisors is an integer number (1827865581).

Almost surely, 2^3655731161 is an apocalyptic number.

It is an amenable number.

3655731161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3655731161 is an equidigital number, since it uses as much as digits as its factorization.

3655731161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 38.

The square root of 3655731161 is about 60462.6426895153. The cubic root of 3655731161 is about 1540.4871625951.

The spelling of 3655731161 in words is "three billion, six hundred fifty-five million, seven hundred thirty-one thousand, one hundred sixty-one".