25954423656 has 32 divisors (see below), whose sum is σ = 74155496640. Its totient is φ = 7415549568.

The previous prime is 25954423639. The next prime is 25954423667. The reversal of 25954423656 is 65632445952.

It is a junction number, because it is equal to n+sod(n) for n = 25954423599 and 25954423608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77245141 + ... + 77245476.

It is an arithmetic number, because the mean of its divisors is an integer number (2317359270).

Almost surely, 2^25954423656 is an apocalyptic number.

It is an amenable number.

25954423656 is an abundant number, since it is smaller than the sum of its proper divisors (48201072984).

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

25954423656 is a wasteful number, since it uses less digits than its factorization.

25954423656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154490633 (or 154490629 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 51.

The spelling of 25954423656 in words is "twenty-five billion, nine hundred fifty-four million, four hundred twenty-three thousand, six hundred fifty-six".