25428907793 has 2 divisors, whose sum is σ = 25428907794. Its totient is φ = 25428907792.

The previous prime is 25428907787. The next prime is 25428907831. The reversal of 25428907793 is 39770982452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16065055504 + 9363852289 = 126748^2 + 96767^2 .

It is a cyclic number.

It is not a de Polignac number, because 25428907793 - 2⁶ = 25428907729 is a prime.

It is a super-3 number, since 3×25428907793³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (25428907703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12714453896 + 12714453897.

It is an arithmetic number, because the mean of its divisors is an integer number (12714453897).

Almost surely, 2^25428907793 is an apocalyptic number.

It is an amenable number.

25428907793 is a deficient number, since it is larger than the sum of its proper divisors (1).

25428907793 is an equidigital number, since it uses as much as digits as its factorization.

25428907793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 25428907793 in words is "twenty-five billion, four hundred twenty-eight million, nine hundred seven thousand, seven hundred ninety-three".