25522749252 has 648 divisors, whose sum is σ = 91531212864. Its totient is φ = 5833555200.

The previous prime is 25522749233. The next prime is 25522749299. The reversal of 25522749252 is 25294722552.

25522749252 is a `hidden beast` number, since 2 + 5 + 522 + 74 + 9 + 2 + 52 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25522749198 and 25522749207.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 380936523 + ... + 380936589.

Almost surely, 2^25522749252 is an apocalyptic number.

25522749252 is a gapful number since it is divisible by the number (22) 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 25522749252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45765606432).

25522749252 is an abundant number, since it is smaller than the sum of its proper divisors (66008463612).

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

25522749252 is a wasteful number, since it uses less digits than its factorization.

25522749252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 134 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 25522749252 in words is "twenty-five billion, five hundred twenty-two million, seven hundred forty-nine thousand, two hundred fifty-two".