15716387425 has 6 divisors (see below), whose sum is σ = 19488320438. Its totient is φ = 12573109920.

The previous prime is 15716387417. The next prime is 15716387437. The reversal of 15716387425 is 52478361751.

It can be written as a sum of positive squares in 3 ways, for example, as 3721976064 + 11994411361 = 61008^2 + 109519^2 .

It is not a de Polignac number, because 15716387425 - 2³ = 15716387417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 314327724 + ... + 314327773.

Almost surely, 2^15716387425 is an apocalyptic number.

It is an amenable number.

15716387425 is a deficient number, since it is larger than the sum of its proper divisors (3771933013).

15716387425 is an equidigital number, since it uses as much as digits as its factorization.

15716387425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628655507 (or 628655502 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 49.

The spelling of 15716387425 in words is "fifteen billion, seven hundred sixteen million, three hundred eighty-seven thousand, four hundred twenty-five".