25461505550 has 48 divisors (see below), whose sum is σ = 52760060640. Its totient is φ = 9076986240.

The previous prime is 25461505501. The next prime is 25461505577. The reversal of 25461505550 is 5550516452.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 656522 + ... + 694221.

It is an arithmetic number, because the mean of its divisors is an integer number (1099167930).

Almost surely, 2^25461505550 is an apocalyptic number.

25461505550 is an abundant number, since it is smaller than the sum of its proper divisors (27298555090).

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

25461505550 is a wasteful number, since it uses less digits than its factorization.

25461505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350797 (or 1350792 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 25461505550 in words is "twenty-five billion, four hundred sixty-one million, five hundred five thousand, five hundred fifty".