117156557 has 8 divisors (see below), whose sum is σ = 137159232. Its totient is φ = 97970400.

The previous prime is 117156551. The next prime is 117156563. The reversal of 117156557 is 755651711.

It is an interprime number because it is at equal distance from previous prime (117156551) and next prime (117156563).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117156557 - 2⁶ = 117156493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117156557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117156551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203819 + ... + 204392.

It is an arithmetic number, because the mean of its divisors is an integer number (17144904).

Almost surely, 2^117156557 is an apocalyptic number.

It is an amenable number.

117156557 is a deficient number, since it is larger than the sum of its proper divisors (20002675).

117156557 is an equidigital number, since it uses as much as digits as its factorization.

117156557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408259.

The product of its digits is 36750, while the sum is 38.

The square root of 117156557 is about 10823.8882569990. Note that the first 3 decimals coincide. The cubic root of 117156557 is about 489.3153801548.

The spelling of 117156557 in words is "one hundred seventeen million, one hundred fifty-six thousand, five hundred fifty-seven".