78625522519 has 2 divisors, whose sum is σ = 78625522520. Its totient is φ = 78625522518.

The previous prime is 78625522513. The next prime is 78625522523. The reversal of 78625522519 is 91522552687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78625522519 - 2⁹ = 78625522007 is a prime.

It is a super-2 number, since 2×78625522519² (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 (78625522513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39312761259 + 39312761260.

It is an arithmetic number, because the mean of its divisors is an integer number (39312761260).

Almost surely, 2^78625522519 is an apocalyptic number.

78625522519 is a deficient number, since it is larger than the sum of its proper divisors (1).

78625522519 is an equidigital number, since it uses as much as digits as its factorization.

78625522519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024000, while the sum is 52.

The spelling of 78625522519 in words is "seventy-eight billion, six hundred twenty-five million, five hundred twenty-two thousand, five hundred nineteen".