111839867740969 has 27 divisors (see below), whose sum is σ = 114001196876847. Its totient is φ = 109719228236544.

The previous prime is 111839867740927. The next prime is 111839867741027. The reversal of 111839867740969 is 969047768938111.

The square root of 111839867740969 is 10575437.

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

It can be written as a sum of positive squares in 13 ways, for example, as 63693088832025 + 48146778908944 = 7980795^2 + 6938788^2 .

It is not a de Polignac number, because 111839867740969 - 2³⁷ = 111702428787497 is a prime.

It is a super-2 number, since 2×111839867740969² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111839867710969) 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, 244726187389 + ... + 244726187845.

Almost surely, 2^{111839867740969} is an apocalyptic number.

111839867740969 is the 10575437-th square number.

111839867740969 is the 5287719-th centered octagonal number.

It is an amenable number.

111839867740969 is a deficient number, since it is larger than the sum of its proper divisors (2161329135878).

111839867740969 is an frugal number, since it uses more digits than its factorization.

111839867740969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 987614208, while the sum is 79.

The spelling of 111839867740969 in words is "one hundred eleven trillion, eight hundred thirty-nine billion, eight hundred sixty-seven million, seven hundred forty thousand, nine hundred sixty-nine".