25349516568 has 32 divisors (see below), whose sum is σ = 70415324400. Its totient is φ = 8449838784.

The previous prime is 25349516519. The next prime is 25349516587. The reversal of 25349516568 is 86561594352.

25349516568 is a `hidden beast` number, since 2 + 534 + 9 + 51 + 6 + 56 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58679221 + ... + 58679652.

Almost surely, 2^25349516568 is an apocalyptic number.

It is an amenable number.

25349516568 is an abundant number, since it is smaller than the sum of its proper divisors (45065807832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25349516568 is a wasteful number, since it uses less digits than its factorization.

25349516568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117358888 (or 117358878 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 54.

The spelling of 25349516568 in words is "twenty-five billion, three hundred forty-nine million, five hundred sixteen thousand, five hundred sixty-eight".