78265813159 has 2 divisors, whose sum is σ = 78265813160. Its totient is φ = 78265813158.

The previous prime is 78265813117. The next prime is 78265813163. The reversal of 78265813159 is 95131856287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78265813159 - 2²⁷ = 78131595431 is a prime.

It is a super-2 number, since 2×78265813159² (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 (78265813459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39132906579 + 39132906580.

It is an arithmetic number, because the mean of its divisors is an integer number (39132906580).

Almost surely, 2^78265813159 is an apocalyptic number.

78265813159 is a deficient number, since it is larger than the sum of its proper divisors (1).

78265813159 is an equidigital number, since it uses as much as digits as its factorization.

78265813159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 55.

The spelling of 78265813159 in words is "seventy-eight billion, two hundred sixty-five million, eight hundred thirteen thousand, one hundred fifty-nine".