25361215816 has 16 divisors (see below), whose sum is σ = 49086224640. Its totient is φ = 12271555920.

The previous prime is 25361215813. The next prime is 25361215829. The reversal of 25361215816 is 61851216352.

It is not an unprimeable number, because it can be changed into a prime (25361215813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51131236 + ... + 51131731.

It is an arithmetic number, because the mean of its divisors is an integer number (3067889040).

Almost surely, 2^25361215816 is an apocalyptic number.

It is an amenable number.

25361215816 is a deficient number, since it is larger than the sum of its proper divisors (23725008824).

25361215816 is a wasteful number, since it uses less digits than its factorization.

25361215816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102263004 (or 102263000 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The spelling of 25361215816 in words is "twenty-five billion, three hundred sixty-one million, two hundred fifteen thousand, eight hundred sixteen".