25800561518790 has 32 divisors (see below), whose sum is σ = 61921538910720. Its totient is φ = 6880128486624.

The previous prime is 25800561518687. The next prime is 25800561518791. The reversal of 25800561518790 is 9781516500852.

It is a self number, because there is not a number n which added to its sum of digits gives 25800561518790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25800561518791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10180851 + ... + 12459969.

It is an arithmetic number, because the mean of its divisors is an integer number (1935048090960).

Almost surely, 2^{25800561518790} is an apocalyptic number.

25800561518790 is an abundant number, since it is smaller than the sum of its proper divisors (36120977391930).

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

25800561518790 is a wasteful number, since it uses less digits than its factorization.

25800561518790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656476.

The product of its (nonzero) digits is 6048000, while the sum is 57.

The spelling of 25800561518790 in words is "twenty-five trillion, eight hundred billion, five hundred sixty-one million, five hundred eighteen thousand, seven hundred ninety".