15557152813 has 2 divisors, whose sum is σ = 15557152814. Its totient is φ = 15557152812.

The previous prime is 15557152801. The next prime is 15557152913. The reversal of 15557152813 is 31825175551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12719779524 + 2837373289 = 112782^2 + 53267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15557152813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15557152813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15557152213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7778576406 + 7778576407.

It is an arithmetic number, because the mean of its divisors is an integer number (7778576407).

Almost surely, 2^15557152813 is an apocalyptic number.

It is an amenable number.

15557152813 is a deficient number, since it is larger than the sum of its proper divisors (1).

15557152813 is an equidigital number, since it uses as much as digits as its factorization.

15557152813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210000, while the sum is 43.

The spelling of 15557152813 in words is "fifteen billion, five hundred fifty-seven million, one hundred fifty-two thousand, eight hundred thirteen".