117531646457 has 4 divisors (see below), whose sum is σ = 117533042676. Its totient is φ = 117530250240.

The previous prime is 117531646399. The next prime is 117531646469. The reversal of 117531646457 is 754646135711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58888243561 + 58643402896 = 242669^2 + 242164^2 .

It is a cyclic number.

It is not a de Polignac number, because 117531646457 - 2²⁰ = 117530597881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117531646487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563144 + ... + 743097.

It is an arithmetic number, because the mean of its divisors is an integer number (29383260669).

Almost surely, 2^117531646457 is an apocalyptic number.

It is an amenable number.

117531646457 is a deficient number, since it is larger than the sum of its proper divisors (1396219).

117531646457 is an equidigital number, since it uses as much as digits as its factorization.

117531646457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396218.

The product of its digits is 2116800, while the sum is 50.

The spelling of 117531646457 in words is "one hundred seventeen billion, five hundred thirty-one million, six hundred forty-six thousand, four hundred fifty-seven".