25435552122 has 56 divisors (see below), whose sum is σ = 57244139316. Its totient is φ = 8472542976.

The previous prime is 25435552097. The next prime is 25435552147. The reversal of 25435552122 is 22125553452.

25435552122 is a `hidden beast` number, since 2 + 5 + 435 + 5 + 5 + 212 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (25435552097) and next prime (25435552147).

It can be written as a sum of positive squares in 2 ways, for example, as 17768623401 + 7666928721 = 133299^2 + 87561^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2381418 + ... + 2392074.

Almost surely, 2^25435552122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25435552122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28622069658).

25435552122 is an abundant number, since it is smaller than the sum of its proper divisors (31808587194).

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

25435552122 is a wasteful number, since it uses less digits than its factorization.

25435552122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12314 (or 12299 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The spelling of 25435552122 in words is "twenty-five billion, four hundred thirty-five million, five hundred fifty-two thousand, one hundred twenty-two".