25784746309 has 16 divisors (see below), whose sum is σ = 31740628480. Its totient is φ = 20451054960.

The previous prime is 25784746297. The next prime is 25784746333. The reversal of 25784746309 is 90364748752.

It is not a de Polignac number, because 25784746309 - 2⁷ = 25784746181 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 25784746309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25784746399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2248587 + ... + 2260024.

It is an arithmetic number, because the mean of its divisors is an integer number (1983789280).

Almost surely, 2^25784746309 is an apocalyptic number.

It is an amenable number.

25784746309 is a deficient number, since it is larger than the sum of its proper divisors (5955882171).

25784746309 is a wasteful number, since it uses less digits than its factorization.

25784746309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508680.

The product of its (nonzero) digits is 10160640, while the sum is 55.

The spelling of 25784746309 in words is "twenty-five billion, seven hundred eighty-four million, seven hundred forty-six thousand, three hundred nine".