25161695650 has 48 divisors (see below), whose sum is σ = 57600938304. Its totient is φ = 7963260480.

The previous prime is 25161695567. The next prime is 25161695701. The reversal of 25161695650 is 5659616152.

It is a super-2 number, since 2×25161695650² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25161695650.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2760472 + ... + 2769571.

It is an arithmetic number, because the mean of its divisors is an integer number (1200019548).

Almost surely, 2^25161695650 is an apocalyptic number.

25161695650 is an abundant number, since it is smaller than the sum of its proper divisors (32439242654).

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

25161695650 is a wasteful number, since it uses less digits than its factorization.

25161695650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530075 (or 5530070 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 46.

The spelling of 25161695650 in words is "twenty-five billion, one hundred sixty-one million, six hundred ninety-five thousand, six hundred fifty".