3640575131161 has 4 divisors (see below), whose sum is σ = 3640608508212. Its totient is φ = 3640541754112.

The previous prime is 3640575131107. The next prime is 3640575131201. The reversal of 3640575131161 is 1611315750463.

3640575131161 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2480766752025 + 1159808379136 = 1575045^2 + 1076944^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640575131161 - 2¹⁵ = 3640575098393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640575161161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16524376 + ... + 16743241.

It is an arithmetic number, because the mean of its divisors is an integer number (910152127053).

Almost surely, 2^{3640575131161} is an apocalyptic number.

It is an amenable number.

3640575131161 is a deficient number, since it is larger than the sum of its proper divisors (33377051).

3640575131161 is a wasteful number, since it uses less digits than its factorization.

3640575131161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33377050.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 3640575131161 in words is "three trillion, six hundred forty billion, five hundred seventy-five million, one hundred thirty-one thousand, one hundred sixty-one".