15715887157 has 2 divisors, whose sum is σ = 15715887158. Its totient is φ = 15715887156.

The previous prime is 15715887137. The next prime is 15715887191. The reversal of 15715887157 is 75178851751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7998440356 + 7717446801 = 89434^2 + 87849^2 .

It is an emirp because it is prime and its reverse (75178851751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15715887157 - 2¹¹ = 15715885109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15715887098 and 15715887107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15715887137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7857943578 + 7857943579.

It is an arithmetic number, because the mean of its divisors is an integer number (7857943579).

Almost surely, 2^15715887157 is an apocalyptic number.

It is an amenable number.

15715887157 is a deficient number, since it is larger than the sum of its proper divisors (1).

15715887157 is an equidigital number, since it uses as much as digits as its factorization.

15715887157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2744000, while the sum is 55.

The spelling of 15715887157 in words is "fifteen billion, seven hundred fifteen million, eight hundred eighty-seven thousand, one hundred fifty-seven".