25516582091 has 32 divisors (see below), whose sum is σ = 34274935296. Its totient is φ = 18345600000.

The previous prime is 25516582079. The next prime is 25516582139. The reversal of 25516582091 is 19028561552.

It is not a de Polignac number, because 25516582091 - 2⁶ = 25516582027 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25516582291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3250331 + ... + 3258171.

It is an arithmetic number, because the mean of its divisors is an integer number (1071091728).

Almost surely, 2^25516582091 is an apocalyptic number.

25516582091 is a deficient number, since it is larger than the sum of its proper divisors (8758353205).

25516582091 is a wasteful number, since it uses less digits than its factorization.

25516582091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11123.

The product of its (nonzero) digits is 216000, while the sum is 44.

The spelling of 25516582091 in words is "twenty-five billion, five hundred sixteen million, five hundred eighty-two thousand, ninety-one".