25258440340 has 48 divisors (see below), whose sum is σ = 60655819392. Its totient is φ = 8654956416.

The previous prime is 25258440283. The next prime is 25258440371. The reversal of 25258440340 is 4304485252.

It is a self number, because there is not a number n which added to its sum of digits gives 25258440340.

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, 190567 + ... + 294673.

It is an arithmetic number, because the mean of its divisors is an integer number (1263662904).

Almost surely, 2^25258440340 is an apocalyptic number.

25258440340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25258440340 is an abundant number, since it is smaller than the sum of its proper divisors (35397379052).

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

25258440340 is a wasteful number, since it uses less digits than its factorization.

25258440340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105856 (or 105854 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

The spelling of 25258440340 in words is "twenty-five billion, two hundred fifty-eight million, four hundred forty thousand, three hundred forty".