117798390251 has 2 divisors, whose sum is σ = 117798390252. Its totient is φ = 117798390250.

The previous prime is 117798390233. The next prime is 117798390271. The reversal of 117798390251 is 152093897711.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117798390251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117798390193 and 117798390202.

It is not a weakly prime, because it can be changed into another prime (117798390271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58899195125 + 58899195126.

It is an arithmetic number, because the mean of its divisors is an integer number (58899195126).

Almost surely, 2^117798390251 is an apocalyptic number.

117798390251 is a deficient number, since it is larger than the sum of its proper divisors (1).

117798390251 is an equidigital number, since it uses as much as digits as its factorization.

117798390251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 53.

The spelling of 117798390251 in words is "one hundred seventeen billion, seven hundred ninety-eight million, three hundred ninety thousand, two hundred fifty-one".