25537535493 has 12 divisors (see below), whose sum is σ = 34789939680. Its totient is φ = 16662784792.

The previous prime is 25537535483. The next prime is 25537535557. The reversal of 25537535493 is 39453573552.

It is not a de Polignac number, because 25537535493 - 2²⁰ = 25536486917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25537535483) 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 11 ways as a sum of consecutive naturals, for example, 1920153 + ... + 1933406.

It is an arithmetic number, because the mean of its divisors is an integer number (2899161640).

Almost surely, 2^25537535493 is an apocalyptic number.

It is an amenable number.

25537535493 is a deficient number, since it is larger than the sum of its proper divisors (9252404187).

25537535493 is an equidigital number, since it uses as much as digits as its factorization.

25537535493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853656 (or 3853609 counting only the distinct ones).

The product of its digits is 8505000, while the sum is 51.

The spelling of 25537535493 in words is "twenty-five billion, five hundred thirty-seven million, five hundred thirty-five thousand, four hundred ninety-three".