78625522571 has 2 divisors, whose sum is σ = 78625522572. Its totient is φ = 78625522570.

The previous prime is 78625522559. The next prime is 78625522589. The reversal of 78625522571 is 17522552687.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78625522571 - 2²² = 78621328267 is a prime.

It is not a weakly prime, because it can be changed into another prime (78625522501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39312761285 + 39312761286.

It is an arithmetic number, because the mean of its divisors is an integer number (39312761286).

Almost surely, 2^78625522571 is an apocalyptic number.

78625522571 is a deficient number, since it is larger than the sum of its proper divisors (1).

78625522571 is an equidigital number, since it uses as much as digits as its factorization.

78625522571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352000, while the sum is 50.

The spelling of 78625522571 in words is "seventy-eight billion, six hundred twenty-five million, five hundred twenty-two thousand, five hundred seventy-one".