117415588721 has 2 divisors, whose sum is σ = 117415588722. Its totient is φ = 117415588720.

The previous prime is 117415588709. The next prime is 117415588753. The reversal of 117415588721 is 127885514711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75702019600 + 41713569121 = 275140^2 + 204239^2 .

It is an emirp because it is prime and its reverse (127885514711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117415588721 - 2³⁰ = 116341846897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117415588721.

It is not a weakly prime, because it can be changed into another prime (117415588621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58707794360 + 58707794361.

It is an arithmetic number, because the mean of its divisors is an integer number (58707794361).

Almost surely, 2^117415588721 is an apocalyptic number.

It is an amenable number.

117415588721 is a deficient number, since it is larger than the sum of its proper divisors (1).

117415588721 is an equidigital number, since it uses as much as digits as its factorization.

117415588721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 627200, while the sum is 50.

The spelling of 117415588721 in words is "one hundred seventeen billion, four hundred fifteen million, five hundred eighty-eight thousand, seven hundred twenty-one".