25421955676 has 24 divisors (see below), whose sum is σ = 47983375440. Its totient is φ = 11715389952.

The previous prime is 25421955641. The next prime is 25421955743. The reversal of 25421955676 is 67655912452.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

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, 336661 + ... + 405196.

It is an arithmetic number, because the mean of its divisors is an integer number (1999307310).

Almost surely, 2^25421955676 is an apocalyptic number.

25421955676 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25421955676 is a deficient number, since it is larger than the sum of its proper divisors (22561419764).

25421955676 is a wasteful number, since it uses less digits than its factorization.

25421955676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742533 (or 742531 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 52.

The spelling of 25421955676 in words is "twenty-five billion, four hundred twenty-one million, nine hundred fifty-five thousand, six hundred seventy-six".