25971618948 has 24 divisors (see below), whose sum is σ = 66109575840. Its totient is φ = 7870187520.

The previous prime is 25971618899. The next prime is 25971618971. The reversal of 25971618948 is 84981617952.

It is a super-2 number, since 2×25971618948² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25971618891 and 25971618900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98377213 + ... + 98377476.

It is an arithmetic number, because the mean of its divisors is an integer number (2754565660).

Almost surely, 2^25971618948 is an apocalyptic number.

It is an amenable number.

25971618948 is an abundant number, since it is smaller than the sum of its proper divisors (40137956892).

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

25971618948 is a wasteful number, since it uses less digits than its factorization.

25971618948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196754707 (or 196754705 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 60.

The spelling of 25971618948 in words is "twenty-five billion, nine hundred seventy-one million, six hundred eighteen thousand, nine hundred forty-eight".