15149897425 has 12 divisors (see below), whose sum is σ = 20230940380. Its totient is φ = 11187616320.

The previous prime is 15149897423. The next prime is 15149897461. The reversal of 15149897425 is 52479894151.

It can be written as a sum of positive squares in 6 ways, for example, as 6389124624 + 8760772801 = 79932^2 + 93599^2 .

It is not a de Polignac number, because 15149897425 - 2¹ = 15149897423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15149897423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23307210 + ... + 23307859.

Almost surely, 2^15149897425 is an apocalyptic number.

It is an amenable number.

15149897425 is a deficient number, since it is larger than the sum of its proper divisors (5081042955).

15149897425 is a wasteful number, since it uses less digits than its factorization.

15149897425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46615092 (or 46615087 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 55.

The spelling of 15149897425 in words is "fifteen billion, one hundred forty-nine million, eight hundred ninety-seven thousand, four hundred twenty-five".