25398537743 has 4 divisors (see below), whose sum is σ = 25401491808. Its totient is φ = 25395583680.

The previous prime is 25398537737. The next prime is 25398537799. The reversal of 25398537743 is 34773589352.

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 25398537743 - 2¹⁶ = 25398472207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25398537343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464098 + ... + 1481343.

It is an arithmetic number, because the mean of its divisors is an integer number (6350372952).

Almost surely, 2^25398537743 is an apocalyptic number.

25398537743 is a deficient number, since it is larger than the sum of its proper divisors (2954065).

25398537743 is an equidigital number, since it uses as much as digits as its factorization.

25398537743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954064.

The product of its digits is 19051200, while the sum is 56.

The spelling of 25398537743 in words is "twenty-five billion, three hundred ninety-eight million, five hundred thirty-seven thousand, seven hundred forty-three".