25212991344 has 40 divisors (see below), whose sum is σ = 65341694352. Its totient is φ = 8377474560.

The previous prime is 25212991333. The next prime is 25212991367. The reversal of 25212991344 is 44319921252.

It is a junction number, because it is equal to n+sod(n) for n = 25212991296 and 25212991305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824067 + ... + 854114.

Almost surely, 2^25212991344 is an apocalyptic number.

25212991344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25212991344 is an abundant number, since it is smaller than the sum of its proper divisors (40128703008).

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

25212991344 is a wasteful number, since it uses less digits than its factorization.

25212991344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678505 (or 1678499 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The spelling of 25212991344 in words is "twenty-five billion, two hundred twelve million, nine hundred ninety-one thousand, three hundred forty-four".