3731881161 has 32 divisors (see below), whose sum is σ = 5215034880. Its totient is φ = 2371590144.

The previous prime is 3731881151. The next prime is 3731881163. The reversal of 3731881161 is 1611881373.

3731881161 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3731881161 - 2⁵ = 3731881129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3731881163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1114656 + ... + 1117998.

It is an arithmetic number, because the mean of its divisors is an integer number (162969840).

Almost surely, 2^3731881161 is an apocalyptic number.

It is an amenable number.

3731881161 is a deficient number, since it is larger than the sum of its proper divisors (1483153719).

3731881161 is a wasteful number, since it uses less digits than its factorization.

3731881161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585.

The product of its digits is 24192, while the sum is 39.

The square root of 3731881161 is about 61089.1247359135. The cubic root of 3731881161 is about 1551.1100145982.

The spelling of 3731881161 in words is "three billion, seven hundred thirty-one million, eight hundred eighty-one thousand, one hundred sixty-one".