111499978016025 has 27 divisors (see below), whose sum is σ = 199709133208221. Its totient is φ = 59466570467040.

The previous prime is 111499978015957. The next prime is 111499978016057. The reversal of 111499978016025 is 520610879994111.

The square root of 111499978016025 is 10559355.

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

111499978016025 is a `hidden beast` number, since 1 + 1 + 1 + 499 + 9 + 7 + 80 + 1 + 60 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 38615647794201 + 72884330221824 = 6214149^2 + 8537232^2 .

It is not a de Polignac number, because 111499978016025 - 2³³ = 111491388081433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 158038347 + ... + 158742303.

Almost surely, 2^{111499978016025} is an apocalyptic number.

111499978016025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111499978016025 is the 10559355-th square number.

111499978016025 is the 5279678-th centered octagonal number.

It is an amenable number.

111499978016025 is a deficient number, since it is larger than the sum of its proper divisors (88209155192196).

111499978016025 is an frugal number, since it uses more digits than its factorization.

111499978016025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407930 (or 703965 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 63.

The spelling of 111499978016025 in words is "one hundred eleven trillion, four hundred ninety-nine billion, nine hundred seventy-eight million, sixteen thousand, twenty-five".