25245331787 has 12 divisors (see below), whose sum is σ = 28693506240. Its totient is φ = 22076885232.

The previous prime is 25245331753. The next prime is 25245331801. The reversal of 25245331787 is 78713354252.

It is not a de Polignac number, because 25245331787 - 2⁶ = 25245331723 is a prime.

It is a super-2 number, since 2×25245331787² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25245331747) 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, 2684987 + ... + 2694372.

It is an arithmetic number, because the mean of its divisors is an integer number (2391125520).

Almost surely, 2^25245331787 is an apocalyptic number.

25245331787 is a deficient number, since it is larger than the sum of its proper divisors (3448174453).

25245331787 is a wasteful number, since it uses less digits than its factorization.

25245331787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5379410 (or 5379391 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 47.

The spelling of 25245331787 in words is "twenty-five billion, two hundred forty-five million, three hundred thirty-one thousand, seven hundred eighty-seven".