25555684479 has 32 divisors (see below), whose sum is σ = 37505631744. Its totient is φ = 15383068800.

The previous prime is 25555684447. The next prime is 25555684481. The reversal of 25555684479 is 97448655552.

It is not a de Polignac number, because 25555684479 - 2⁵ = 25555684447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555684409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287854 + ... + 366020.

It is an arithmetic number, because the mean of its divisors is an integer number (1172050992).

Almost surely, 2^25555684479 is an apocalyptic number.

25555684479 is a deficient number, since it is larger than the sum of its proper divisors (11949947265).

25555684479 is a wasteful number, since it uses less digits than its factorization.

25555684479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78367.

The product of its digits is 60480000, while the sum is 60.

The spelling of 25555684479 in words is "twenty-five billion, five hundred fifty-five million, six hundred eighty-four thousand, four hundred seventy-nine".