15625613879 has 2 divisors, whose sum is σ = 15625613880. Its totient is φ = 15625613878.

The previous prime is 15625613873. The next prime is 15625613911. The reversal of 15625613879 is 97831652651.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (97831652651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15625613879 - 2⁴ = 15625613863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15625613879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15625613873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7812806939 + 7812806940.

It is an arithmetic number, because the mean of its divisors is an integer number (7812806940).

Almost surely, 2^15625613879 is an apocalyptic number.

15625613879 is a deficient number, since it is larger than the sum of its proper divisors (1).

15625613879 is an equidigital number, since it uses as much as digits as its factorization.

15625613879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 53.

The spelling of 15625613879 in words is "fifteen billion, six hundred twenty-five million, six hundred thirteen thousand, eight hundred seventy-nine".