117078006581 has 2 divisors, whose sum is σ = 117078006582. Its totient is φ = 117078006580.

The previous prime is 117078006533. The next prime is 117078006601. The reversal of 117078006581 is 185600870711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64724448100 + 52353558481 = 254410^2 + 228809^2 .

It is a cyclic number.

It is not a de Polignac number, because 117078006581 - 2¹⁸ = 117077744437 is a prime.

It is a super-2 number, since 2×117078006581² (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 (117078006181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58539003290 + 58539003291.

It is an arithmetic number, because the mean of its divisors is an integer number (58539003291).

Almost surely, 2^117078006581 is an apocalyptic number.

It is an amenable number.

117078006581 is a deficient number, since it is larger than the sum of its proper divisors (1).

117078006581 is an equidigital number, since it uses as much as digits as its factorization.

117078006581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 44.

The spelling of 117078006581 in words is "one hundred seventeen billion, seventy-eight million, six thousand, five hundred eighty-one".