117780639287 has 2 divisors, whose sum is σ = 117780639288. Its totient is φ = 117780639286.

The previous prime is 117780639271. The next prime is 117780639329. The reversal of 117780639287 is 782936087711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117780639287 - 2⁴ = 117780639271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117780639217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58890319643 + 58890319644.

It is an arithmetic number, because the mean of its divisors is an integer number (58890319644).

Almost surely, 2^117780639287 is an apocalyptic number.

117780639287 is a deficient number, since it is larger than the sum of its proper divisors (1).

117780639287 is an equidigital number, since it uses as much as digits as its factorization.

117780639287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7112448, while the sum is 59.

The spelling of 117780639287 in words is "one hundred seventeen billion, seven hundred eighty million, six hundred thirty-nine thousand, two hundred eighty-seven".