25558020384 has 48 divisors (see below), whose sum is σ = 72250561152. Its totient is φ = 7864005888.

The previous prime is 25558020379. The next prime is 25558020403. The reversal of 25558020384 is 48302085552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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, 10238344 + ... + 10240839.

It is an arithmetic number, because the mean of its divisors is an integer number (1505220024).

Almost surely, 2^25558020384 is an apocalyptic number.

25558020384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25558020384 is an abundant number, since it is smaller than the sum of its proper divisors (46692540768).

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

25558020384 is a wasteful number, since it uses less digits than its factorization.

25558020384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20479209 (or 20479201 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 42.

The spelling of 25558020384 in words is "twenty-five billion, five hundred fifty-eight million, twenty thousand, three hundred eighty-four".