25375025520 has 1200 divisors, whose sum is σ = 106754060160. Its totient is φ = 5555257344.

The previous prime is 25375025461. The next prime is 25375025569. The reversal of 25375025520 is 2552057352.

25375025520 is a `hidden beast` number, since 2 + 53 + 7 + 50 + 2 + 552 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 539894137 + ... + 539894183.

Almost surely, 2^25375025520 is an apocalyptic number.

25375025520 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 25375025520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53377030080).

25375025520 is an abundant number, since it is smaller than the sum of its proper divisors (81379034640).

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

25375025520 is a wasteful number, since it uses less digits than its factorization.

25375025520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 36.

The spelling of 25375025520 in words is "twenty-five billion, three hundred seventy-five million, twenty-five thousand, five hundred twenty".