25461104903550 has 72 divisors (see below), whose sum is σ = 72429354912096. Its totient is φ = 6390238091520.

The previous prime is 25461104903537. The next prime is 25461104903551. The reversal of 25461104903550 is 5530940116452.

It is a happy number.

25461104903550 is a `hidden beast` number, since 2 + 5 + 4 + 6 + 1 + 1 + 0 + 4 + 90 + 3 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 25461104903496 and 25461104903505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25461104903551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1664116854 + ... + 1664132153.

It is an arithmetic number, because the mean of its divisors is an integer number (1005963262668).

Almost surely, 2^{25461104903550} is an apocalyptic number.

25461104903550 is an abundant number, since it is smaller than the sum of its proper divisors (46968250008546).

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

25461104903550 is a wasteful number, since it uses less digits than its factorization.

25461104903550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328249042 (or 3328249034 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 25461104903550 in words is "twenty-five trillion, four hundred sixty-one billion, one hundred four million, nine hundred three thousand, five hundred fifty".