117318202657 has 4 divisors (see below), whose sum is σ = 120179622276. Its totient is φ = 114456783040.

The previous prime is 117318202613. The next prime is 117318202721. The reversal of 117318202657 is 756202813711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 756202813711 = 197 ⋅3838592963.

It can be written as a sum of positive squares in 2 ways, for example, as 70755468001 + 46562734656 = 265999^2 + 215784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117318202657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117318202357) 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, 1430709748 + ... + 1430709829.

It is an arithmetic number, because the mean of its divisors is an integer number (30044905569).

Almost surely, 2^117318202657 is an apocalyptic number.

It is an amenable number.

117318202657 is a deficient number, since it is larger than the sum of its proper divisors (2861419619).

117318202657 is an equidigital number, since it uses as much as digits as its factorization.

117318202657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861419618.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 117318202657 in words is "one hundred seventeen billion, three hundred eighteen million, two hundred two thousand, six hundred fifty-seven".