117578117887 has 2 divisors, whose sum is σ = 117578117888. Its totient is φ = 117578117886.

The previous prime is 117578117851. The next prime is 117578117897. The reversal of 117578117887 is 788711875711.

It is a strong prime.

It is an emirp because it is prime and its reverse (788711875711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117578117887 - 2⁷ = 117578117759 is a prime.

It is a super-2 number, since 2×117578117887² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117578117837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58789058943 + 58789058944.

It is an arithmetic number, because the mean of its divisors is an integer number (58789058944).

Almost surely, 2^117578117887 is an apocalyptic number.

117578117887 is a deficient number, since it is larger than the sum of its proper divisors (1).

117578117887 is an equidigital number, since it uses as much as digits as its factorization.

117578117887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6146560, while the sum is 61.

The spelling of 117578117887 in words is "one hundred seventeen billion, five hundred seventy-eight million, one hundred seventeen thousand, eight hundred eighty-seven".