25444123451055 has 48 divisors (see below), whose sum is σ = 45449366324544. Its totient is φ = 13159941788160.

The previous prime is 25444123451027. The next prime is 25444123451057. The reversal of 25444123451055 is 55015432144452.

25444123451055 is a `hidden beast` number, since 2 + 5 + 4 + 4 + 4 + 123 + 4 + 510 + 5 + 5 = 666.

It is not a de Polignac number, because 25444123451055 - 2⁸ = 25444123450799 is a prime.

It is a super-2 number, since 2×25444123451055² (a number of 28 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25444123451055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25444123451057) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40981864 + ... + 41598093.

It is an arithmetic number, because the mean of its divisors is an integer number (946861798428).

Almost surely, 2^{25444123451055} is an apocalyptic number.

25444123451055 is a deficient number, since it is larger than the sum of its proper divisors (20005242873489).

25444123451055 is a wasteful number, since it uses less digits than its factorization.

25444123451055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82580176 (or 82580173 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 45.

The spelling of 25444123451055 in words is "twenty-five trillion, four hundred forty-four billion, one hundred twenty-three million, four hundred fifty-one thousand, fifty-five".