25000252640 has 96 divisors (see below), whose sum is σ = 65648421216. Its totient is φ = 8919439360.

The previous prime is 25000252639. The next prime is 25000252679. The reversal of 25000252640 is 4625200052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40727 + ... + 227286.

It is an arithmetic number, because the mean of its divisors is an integer number (683837721).

Almost surely, 2^25000252640 is an apocalyptic number.

25000252640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25000252640 is an abundant number, since it is smaller than the sum of its proper divisors (40648168576).

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

25000252640 is a wasteful number, since it uses less digits than its factorization.

25000252640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268092 (or 268084 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 25000252640 its reverse (4625200052), we get a palindrome (29625452692).

The spelling of 25000252640 in words is "twenty-five billion, two hundred fifty-two thousand, six hundred forty".