25252780343 has 4 divisors (see below), whose sum is σ = 28860320400. Its totient is φ = 21645240288.

The previous prime is 25252780331. The next prime is 25252780363. The reversal of 25252780343 is 34308725252.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25252780343 - 2²⁰ = 25251731767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25252780343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25252780363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1803770018 + ... + 1803770031.

It is an arithmetic number, because the mean of its divisors is an integer number (7215080100).

Almost surely, 2^25252780343 is an apocalyptic number.

25252780343 is a deficient number, since it is larger than the sum of its proper divisors (3607540057).

25252780343 is an equidigital number, since it uses as much as digits as its factorization.

25252780343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607540056.

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 25252780343 in words is "twenty-five billion, two hundred fifty-two million, seven hundred eighty thousand, three hundred forty-three".