25745925739 has 4 divisors (see below), whose sum is σ = 25746875056. Its totient is φ = 25744976424.

The previous prime is 25745925721. The next prime is 25745925749. The reversal of 25745925739 is 93752954752.

It is a happy number.

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 25745925739 - 2²⁷ = 25611708011 is a prime.

It is a super-2 number, since 2×25745925739² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25745925749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432744 + ... + 488629.

It is an arithmetic number, because the mean of its divisors is an integer number (6436718764).

Almost surely, 2^25745925739 is an apocalyptic number.

25745925739 is a deficient number, since it is larger than the sum of its proper divisors (949317).

25745925739 is an equidigital number, since it uses as much as digits as its factorization.

25745925739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949316.

The product of its digits is 23814000, while the sum is 58.

The spelling of 25745925739 in words is "twenty-five billion, seven hundred forty-five million, nine hundred twenty-five thousand, seven hundred thirty-nine".