25645450545 has 192 divisors, whose sum is σ = 56467756800. Its totient is φ = 10577848320.

The previous prime is 25645450499. The next prime is 25645450577. The reversal of 25645450545 is 54505454652.

25645450545 is a `hidden beast` number, since 2 + 5 + 6 + 4 + 54 + 50 + 545 = 666.

It is not a de Polignac number, because 25645450545 - 2⁸ = 25645450289 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25645450545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4520971 + ... + 4526639.

It is an arithmetic number, because the mean of its divisors is an integer number (294102900).

Almost surely, 2^25645450545 is an apocalyptic number.

It is an amenable number.

25645450545 is an abundant number, since it is smaller than the sum of its proper divisors (30822306255).

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

25645450545 is a wasteful number, since it uses less digits than its factorization.

25645450545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5760 (or 5757 counting only the distinct ones).

The product of its (nonzero) digits is 2400000, while the sum is 45.

The spelling of 25645450545 in words is "twenty-five billion, six hundred forty-five million, four hundred fifty thousand, five hundred forty-five".