25251206140 has 48 divisors (see below), whose sum is σ = 53286377760. Its totient is φ = 10051292160.

The previous prime is 25251206137. The next prime is 25251206177. The reversal of 25251206140 is 4160215252.

It is a junction number, because it is equal to n+sod(n) for n = 25251206099 and 25251206108.

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, 4122280 + ... + 4128400.

It is an arithmetic number, because the mean of its divisors is an integer number (1110132870).

Almost surely, 2^25251206140 is an apocalyptic number.

25251206140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25251206140 is an abundant number, since it is smaller than the sum of its proper divisors (28035171620).

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

25251206140 is a wasteful number, since it uses less digits than its factorization.

25251206140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7102 (or 7100 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 25251206140 in words is "twenty-five billion, two hundred fifty-one million, two hundred six thousand, one hundred forty".