117131640025 has 9 divisors (see below), whose sum is σ = 145245355581. Its totient is φ = 93703943040.

The previous prime is 117131639941. The next prime is 117131640049. The reversal of 117131640025 is 520046131711.

The square root of 117131640025 is 342245.

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

It can be written as a sum of positive squares in 4 ways, for example, as 45459783369 + 71671856656 = 213213^2 + 267716^2 .

It is not a de Polignac number, because 117131640025 - 2³⁵ = 82771901657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1677001 + ... + 1745449.

Almost surely, 2^117131640025 is an apocalyptic number.

117131640025 is the 342245-th square number.

117131640025 is the 171123-rd centered octagonal number.

It is an amenable number.

117131640025 is a deficient number, since it is larger than the sum of its proper divisors (28113715556).

117131640025 is an frugal number, since it uses more digits than its factorization.

117131640025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136908 (or 68454 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

Adding to 117131640025 its reverse (520046131711), we get a palindrome (637177771736).

The spelling of 117131640025 in words is "one hundred seventeen billion, one hundred thirty-one million, six hundred forty thousand, twenty-five".