25855947384 has 32 divisors (see below), whose sum is σ = 68041968000. Its totient is φ = 8165035872.

The previous prime is 25855947353. The next prime is 25855947401. The reversal of 25855947384 is 48374955852.

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, 28350364 + ... + 28351275.

It is an arithmetic number, because the mean of its divisors is an integer number (2126311500).

Almost surely, 2^25855947384 is an apocalyptic number.

25855947384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25855947384 is an abundant number, since it is smaller than the sum of its proper divisors (42186020616).

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

25855947384 is a wasteful number, since it uses less digits than its factorization.

25855947384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56701667 (or 56701663 counting only the distinct ones).

The product of its digits is 48384000, while the sum is 60.

The spelling of 25855947384 in words is "twenty-five billion, eight hundred fifty-five million, nine hundred forty-seven thousand, three hundred eighty-four".