3691881963 has 64 divisors (see below), whose sum is σ = 7178035200. Its totient is φ = 1816901280.

The previous prime is 3691881937. The next prime is 3691881979.

3691881963 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 3691881963 - 2⁸ = 3691881707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3691881563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7231 + ... + 86232.

It is an arithmetic number, because the mean of its divisors is an integer number (112156800).

Almost surely, 2^3691881963 is an apocalyptic number.

3691881963 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3691881963 is a deficient number, since it is larger than the sum of its proper divisors (3486153237).

3691881963 is a wasteful number, since it uses less digits than its factorization.

3691881963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93509 (or 93503 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 3691881963 is about 60760.8588072947. The cubic root of 3691881963 is about 1545.5483735372.

The spelling of 3691881963 in words is "three billion, six hundred ninety-one million, eight hundred eighty-one thousand, nine hundred sixty-three".