78625522589 has 2 divisors, whose sum is σ = 78625522590. Its totient is φ = 78625522588.

The previous prime is 78625522571. The next prime is 78625522603. The reversal of 78625522589 is 98522552687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73052900089 + 5572622500 = 270283^2 + 74650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78625522589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78625522519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39312761294 + 39312761295.

It is an arithmetic number, because the mean of its divisors is an integer number (39312761295).

Almost surely, 2^78625522589 is an apocalyptic number.

It is an amenable number.

78625522589 is a deficient number, since it is larger than the sum of its proper divisors (1).

78625522589 is an equidigital number, since it uses as much as digits as its factorization.

78625522589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192000, while the sum is 59.

The spelling of 78625522589 in words is "seventy-eight billion, six hundred twenty-five million, five hundred twenty-two thousand, five hundred eighty-nine".