117171215557 has 8 divisors (see below), whose sum is σ = 127897958880. Its totient is φ = 106456941360.

The previous prime is 117171215521. The next prime is 117171215587. The reversal of 117171215557 is 755512171711.

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

It is a de Polignac number, because none of the positive numbers 2^k-117171215557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117171215587) 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, 3097623 + ... + 3135220.

It is an arithmetic number, because the mean of its divisors is an integer number (15987244860).

Almost surely, 2^117171215557 is an apocalyptic number.

It is an amenable number.

117171215557 is a deficient number, since it is larger than the sum of its proper divisors (10726743323).

117171215557 is a wasteful number, since it uses less digits than its factorization.

117171215557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234563.

The product of its digits is 85750, while the sum is 43.

The spelling of 117171215557 in words is "one hundred seventeen billion, one hundred seventy-one million, two hundred fifteen thousand, five hundred fifty-seven".