25827717672 has 80 divisors (see below), whose sum is σ = 72639668640. Its totient is φ = 8609186736.

The previous prime is 25827717563. The next prime is 25827717739. The reversal of 25827717672 is 27671772852.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 75453 + ... + 239475.

It is an arithmetic number, because the mean of its divisors is an integer number (907995858).

Almost surely, 2^25827717672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25827717672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36319834320).

25827717672 is an abundant number, since it is smaller than the sum of its proper divisors (46811950968).

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

25827717672 is an frugal number, since it uses more digits than its factorization.

25827717672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164056 (or 164028 counting only the distinct ones).

The product of its digits is 4609920, while the sum is 54.

The spelling of 25827717672 in words is "twenty-five billion, eight hundred twenty-seven million, seven hundred seventeen thousand, six hundred seventy-two".