25135045650 has 216 divisors, whose sum is σ = 79938620580. Its totient is φ = 5624467200.

The previous prime is 25135045601. The next prime is 25135045651. The reversal of 25135045650 is 5654053152.

25135045650 is a `hidden beast` number, since 2 + 51 + 3 + 504 + 56 + 50 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1171076841 + 23963968809 = 34221^2 + 154803^2 .

It is not an unprimeable number, because it can be changed into a prime (25135045651) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 690096 + ... + 725604.

Almost surely, 2^25135045650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25135045650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39969310290).

25135045650 is an abundant number, since it is smaller than the sum of its proper divisors (54803574930).

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

25135045650 is a wasteful number, since it uses less digits than its factorization.

25135045650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35562 (or 35543 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 25135045650 in words is "twenty-five billion, one hundred thirty-five million, forty-five thousand, six hundred fifty".