25496615487 has 24 divisors (see below), whose sum is σ = 41271842176. Its totient is φ = 13712462208.

The previous prime is 25496615471. The next prime is 25496615503. The reversal of 25496615487 is 78451669452.

It is an interprime number because it is at equal distance from previous prime (25496615471) and next prime (25496615503).

It is not a de Polignac number, because 25496615487 - 2⁴ = 25496615471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25496615407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2094493 + ... + 2106630.

Almost surely, 2^25496615487 is an apocalyptic number.

25496615487 is a deficient number, since it is larger than the sum of its proper divisors (15775226689).

25496615487 is a wasteful number, since it uses less digits than its factorization.

25496615487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201167 (or 4201150 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 57.

The spelling of 25496615487 in words is "twenty-five billion, four hundred ninety-six million, six hundred fifteen thousand, four hundred eighty-seven".