13199941881 has 27 divisors (see below), whose sum is σ = 22183548933. Its totient is φ = 7541445240.

The previous prime is 13199941849. The next prime is 13199941889. The reversal of 13199941881 is 18814999131.

The square root of 13199941881 is 114891.

It is a perfect power (a square), and thus also a powerful number.

13199941881 is a `hidden beast` number, since 131 + 9 + 99 + 418 + 8 + 1 = 666.

It is not a de Polignac number, because 13199941881 - 2⁵ = 13199941849 is a prime.

It is a super-2 number, since 2×13199941881² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13199941889) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2409976 + ... + 2415446.

Almost surely, 2^13199941881 is an apocalyptic number.

13199941881 is the 114891-st square number.

13199941881 is the 57446-th centered octagonal number.

It is an amenable number.

13199941881 is a deficient number, since it is larger than the sum of its proper divisors (8983607052).

13199941881 is an frugal number, since it uses more digits than its factorization.

13199941881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10962 (or 5481 counting only the distinct ones).

The product of its digits is 559872, while the sum is 54.

The spelling of 13199941881 in words is "thirteen billion, one hundred ninety-nine million, nine hundred forty-one thousand, eight hundred eighty-one".