25025052540 has 24 divisors (see below), whose sum is σ = 70070147280. Its totient is φ = 6673347328.

The previous prime is 25025052499. The next prime is 25025052541. The reversal of 25025052540 is 4525052052.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25025052498 and 25025052507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25025052541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208542045 + ... + 208542164.

It is an arithmetic number, because the mean of its divisors is an integer number (2919589470).

Almost surely, 2^25025052540 is an apocalyptic number.

25025052540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25025052540 is an abundant number, since it is smaller than the sum of its proper divisors (45045094740).

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

25025052540 is a wasteful number, since it uses less digits than its factorization.

25025052540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417084221 (or 417084219 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The spelling of 25025052540 in words is "twenty-five billion, twenty-five million, fifty-two thousand, five hundred forty".