25426771620 has 96 divisors (see below), whose sum is σ = 72447927552. Its totient is φ = 6661859328.

The previous prime is 25426771619. The next prime is 25426771631. The reversal of 25426771620 is 2617762452.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1140904 + ... + 1162976.

It is an arithmetic number, because the mean of its divisors is an integer number (754665912).

Almost surely, 2^25426771620 is an apocalyptic number.

25426771620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25426771620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36223963776).

25426771620 is an abundant number, since it is smaller than the sum of its proper divisors (47021155932).

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

25426771620 is a wasteful number, since it uses less digits than its factorization.

25426771620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22421 (or 22419 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 25426771620 in words is "twenty-five billion, four hundred twenty-six million, seven hundred seventy-one thousand, six hundred twenty".