111513919969 has 9 divisors (see below), whose sum is σ = 116581182193. Its totient is φ = 106658142052.

The previous prime is 111513919927. The next prime is 111513919997. The reversal of 111513919969 is 969919315111.

The square root of 111513919969 is 333937.

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

It is not a de Polignac number, because 111513919969 - 2¹⁵ = 111513887201 is a prime.

It is a super-2 number, since 2×111513919969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111513919669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7673292 + ... + 7687810.

Almost surely, 2^111513919969 is an apocalyptic number.

111513919969 is the 333937-th square number.

111513919969 is the 166969-th centered octagonal number.

It is an amenable number.

111513919969 is a deficient number, since it is larger than the sum of its proper divisors (5067262224).

111513919969 is an frugal number, since it uses more digits than its factorization.

111513919969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29084 (or 14542 counting only the distinct ones).

The product of its digits is 590490, while the sum is 55.

The spelling of 111513919969 in words is "one hundred eleven billion, five hundred thirteen million, nine hundred nineteen thousand, nine hundred sixty-nine".