25561772323 has 16 divisors (see below), whose sum is σ = 26270244000. Its totient is φ = 24862090240.

The previous prime is 25561772321. The next prime is 25561772329. The reversal of 25561772323 is 32327716552.

It is a cyclic number.

It is not a de Polignac number, because 25561772323 - 2¹ = 25561772321 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 25561772323.

It is not an unprimeable number, because it can be changed into a prime (25561772321) 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 15 ways as a sum of consecutive naturals, for example, 13114353 + ... + 13116301.

It is an arithmetic number, because the mean of its divisors is an integer number (1641890250).

Almost surely, 2^25561772323 is an apocalyptic number.

25561772323 is a deficient number, since it is larger than the sum of its proper divisors (708471677).

25561772323 is a wasteful number, since it uses less digits than its factorization.

25561772323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022.

The product of its digits is 529200, while the sum is 43.

The spelling of 25561772323 in words is "twenty-five billion, five hundred sixty-one million, seven hundred seventy-two thousand, three hundred twenty-three".