25393645152 has 120 divisors (see below), whose sum is σ = 74834320176. Its totient is φ = 8447286528.

The previous prime is 25393645117. The next prime is 25393645157. The reversal of 25393645152 is 25154639352.

25393645152 is a `hidden beast` number, since 2 + 539 + 3 + 64 + 5 + 1 + 52 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25393645098 and 25393645107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25393645157) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1294038 + ... + 1313514.

Almost surely, 2^25393645152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25393645152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37417160088).

25393645152 is an abundant number, since it is smaller than the sum of its proper divisors (49440675024).

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

25393645152 is a wasteful number, since it uses less digits than its factorization.

25393645152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20002 (or 19985 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

The spelling of 25393645152 in words is "twenty-five billion, three hundred ninety-three million, six hundred forty-five thousand, one hundred fifty-two".