25026528491 has 4 divisors (see below), whose sum is σ = 25450707000. Its totient is φ = 24602349984.

The previous prime is 25026528481. The next prime is 25026528493. The reversal of 25026528491 is 19482562052.

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

It is a cyclic number.

It is not a de Polignac number, because 25026528491 - 2¹⁰ = 25026527467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25026528493) 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 3 ways as a sum of consecutive naturals, for example, 212089166 + ... + 212089283.

It is an arithmetic number, because the mean of its divisors is an integer number (6362676750).

Almost surely, 2^25026528491 is an apocalyptic number.

25026528491 is a deficient number, since it is larger than the sum of its proper divisors (424178509).

25026528491 is an equidigital number, since it uses as much as digits as its factorization.

25026528491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424178508.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 25026528491 in words is "twenty-five billion, twenty-six million, five hundred twenty-eight thousand, four hundred ninety-one".