25837541813 has 2 divisors, whose sum is σ = 25837541814. Its totient is φ = 25837541812.

The previous prime is 25837541803. The next prime is 25837541831. The reversal of 25837541813 is 31814573852.

Together with next prime (25837541831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16936940164 + 8900601649 = 130142^2 + 94343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25837541813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25837541803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12918770906 + 12918770907.

It is an arithmetic number, because the mean of its divisors is an integer number (12918770907).

Almost surely, 2^25837541813 is an apocalyptic number.

It is an amenable number.

25837541813 is a deficient number, since it is larger than the sum of its proper divisors (1).

25837541813 is an equidigital number, since it uses as much as digits as its factorization.

25837541813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 47.

The spelling of 25837541813 in words is "twenty-five billion, eight hundred thirty-seven million, five hundred forty-one thousand, eight hundred thirteen".