25620445620 has 288 divisors, whose sum is σ = 97699021056. Its totient is φ = 5323380480.

The previous prime is 25620445583. The next prime is 25620445661. The reversal of 25620445620 is 2654402652.

25620445620 is a `hidden beast` number, since 2 + 5 + 6 + 20 + 4 + 4 + 5 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1669422 + ... + 1684698.

It is an arithmetic number, because the mean of its divisors is an integer number (339232712).

Almost surely, 2^25620445620 is an apocalyptic number.

25620445620 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 25620445620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48849510528).

25620445620 is an abundant number, since it is smaller than the sum of its proper divisors (72078575436).

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

25620445620 is a wasteful number, since it uses less digits than its factorization.

25620445620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15332 (or 15305 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 25620445620 in words is "twenty-five billion, six hundred twenty million, four hundred forty-five thousand, six hundred twenty".