117642047779 has 2 divisors, whose sum is σ = 117642047780. Its totient is φ = 117642047778.

The previous prime is 117642047749. The next prime is 117642047807. The reversal of 117642047779 is 977740246711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117642047779 - 2³³ = 109052113187 is a prime.

It is not a weakly prime, because it can be changed into another prime (117642047749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58821023889 + 58821023890.

It is an arithmetic number, because the mean of its divisors is an integer number (58821023890).

Almost surely, 2^117642047779 is an apocalyptic number.

117642047779 is a deficient number, since it is larger than the sum of its proper divisors (1).

117642047779 is an equidigital number, since it uses as much as digits as its factorization.

117642047779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4148928, while the sum is 55.

The spelling of 117642047779 in words is "one hundred seventeen billion, six hundred forty-two million, forty-seven thousand, seven hundred seventy-nine".