25125864681 has 8 divisors (see below), whose sum is σ = 34050352384. Its totient is φ = 16475976720.

The previous prime is 25125864649. The next prime is 25125864691. The reversal of 25125864681 is 18646852152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25125864681 - 2⁵ = 25125864649 is a prime.

It is a super-2 number, since 2×25125864681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25125864681.

It is not an unprimeable number, because it can be changed into a prime (25125864691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68649721 + ... + 68650086.

It is an arithmetic number, because the mean of its divisors is an integer number (4256294048).

Almost surely, 2^25125864681 is an apocalyptic number.

It is an amenable number.

25125864681 is a deficient number, since it is larger than the sum of its proper divisors (8924487703).

25125864681 is a wasteful number, since it uses less digits than its factorization.

25125864681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137299871.

The product of its digits is 921600, while the sum is 48.

The spelling of 25125864681 in words is "twenty-five billion, one hundred twenty-five million, eight hundred sixty-four thousand, six hundred eighty-one".