25772009523 has 16 divisors (see below), whose sum is σ = 37056489120. Its totient is φ = 15838043904.

The previous prime is 25772009521. The next prime is 25772009573. The reversal of 25772009523 is 32590027752.

It is not a de Polignac number, because 25772009523 - 2¹ = 25772009521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25772009521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422178 + ... + 479351.

It is an arithmetic number, because the mean of its divisors is an integer number (2316030570).

Almost surely, 2^25772009523 is an apocalyptic number.

25772009523 is a deficient number, since it is larger than the sum of its proper divisors (11284479597).

25772009523 is a wasteful number, since it uses less digits than its factorization.

25772009523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902278.

The product of its (nonzero) digits is 264600, while the sum is 42.

The spelling of 25772009523 in words is "twenty-five billion, seven hundred seventy-two million, nine thousand, five hundred twenty-three".