111992630409 has 27 divisors (see below), whose sum is σ = 177827689767. Its totient is φ = 67867628400.

The previous prime is 111992630401. The next prime is 111992630417. The reversal of 111992630409 is 904036299111.

The square root of 111992630409 is 334653.

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

111992630409 is a `hidden beast` number, since 1 + 1 + 1 + 9 + 9 + 2 + 630 + 4 + 0 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (111992630401) and next prime (111992630417).

It can be written as a sum of positive squares in only one way, i.e., 20219986809 + 91772643600 = 142197^2 + 302940^2 .

It is not a de Polignac number, because 111992630409 - 2³ = 111992630401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111992630401) 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, 11038479 + ... + 11048619.

Almost surely, 2^111992630409 is an apocalyptic number.

111992630409 is the 334653-rd square number.

111992630409 is the 167327-th centered octagonal number.

It is an amenable number.

111992630409 is a deficient number, since it is larger than the sum of its proper divisors (65835059358).

111992630409 is an frugal number, since it uses more digits than its factorization.

111992630409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20310 (or 10155 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 111992630409 in words is "one hundred eleven billion, nine hundred ninety-two million, six hundred thirty thousand, four hundred nine".