25550622720 has 1248 divisors, whose sum is σ = 112949303040. Its totient is φ = 5449973760.

The previous prime is 25550622677. The next prime is 25550622731. The reversal of 25550622720 is 2722605552.

It is a happy number.

25550622720 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 0 + 622 + 7 + 20 = 666.

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

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, 623185900 + ... + 623185940.

Almost surely, 2^25550622720 is an apocalyptic number.

25550622720 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 25550622720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56474651520).

25550622720 is an abundant number, since it is smaller than the sum of its proper divisors (87398680320).

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

25550622720 is a wasteful number, since it uses less digits than its factorization.

25550622720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The spelling of 25550622720 in words is "twenty-five billion, five hundred fifty million, six hundred twenty-two thousand, seven hundred twenty".