25958514440 has 16 divisors (see below), whose sum is σ = 58406657580. Its totient is φ = 10383405760.

The previous prime is 25958514431. The next prime is 25958514443. The reversal of 25958514440 is 4441585952.

It can be written as a sum of positive squares in 2 ways, for example, as 23578830916 + 2379683524 = 153554^2 + 48782^2 .

It is not an unprimeable number, because it can be changed into a prime (25958514443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324481391 + ... + 324481470.

Almost surely, 2^25958514440 is an apocalyptic number.

25958514440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25958514440 is an abundant number, since it is smaller than the sum of its proper divisors (32448143140).

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

25958514440 is a wasteful number, since it uses less digits than its factorization.

25958514440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648962872 (or 648962868 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 25958514440 in words is "twenty-five billion, nine hundred fifty-eight million, five hundred fourteen thousand, four hundred forty".