25916501863 has 18 divisors (see below), whose sum is σ = 30076997528. Its totient is φ = 21875713440.

The previous prime is 25916501839. The next prime is 25916501873. The reversal of 25916501863 is 36810561952.

It is not a de Polignac number, because 25916501863 - 2¹³ = 25916493671 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 (25916501873) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 30240531 + ... + 30241387.

Almost surely, 2^25916501863 is an apocalyptic number.

25916501863 is a deficient number, since it is larger than the sum of its proper divisors (4160495665).

25916501863 is an frugal number, since it uses more digits than its factorization.

25916501863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 25916501863 in words is "twenty-five billion, nine hundred sixteen million, five hundred one thousand, eight hundred sixty-three".