25505551484 has 12 divisors (see below), whose sum is σ = 51011103024. Its totient is φ = 10930950624.

The previous prime is 25505551481. The next prime is 25505551517. The reversal of 25505551484 is 48415550552.

It is a happy number.

25505551484 is an admirable number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505551481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455456249 + ... + 455456304.

It is an arithmetic number, because the mean of its divisors is an integer number (4250925252).

Almost surely, 2^25505551484 is an apocalyptic number.

It is an amenable number.

25505551484 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25505551484 is a wasteful number, since it uses less digits than its factorization.

25505551484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910912564 (or 910912562 counting only the distinct ones).

The product of its (nonzero) digits is 800000, while the sum is 44.

The spelling of 25505551484 in words is "twenty-five billion, five hundred five million, five hundred fifty-one thousand, four hundred eighty-four".