25813457469 has 12 divisors (see below), whose sum is σ = 37536349500. Its totient is φ = 17093474304.

The previous prime is 25813457387. The next prime is 25813457473. The reversal of 25813457469 is 96475431852.

It is a happy number.

25813457469 is a `hidden beast` number, since 2 + 5 + 8 + 1 + 3 + 4 + 574 + 69 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1002482244 + 24810975225 = 31662^2 + 157515^2 .

It is not a de Polignac number, because 25813457469 - 2⁹ = 25813456957 is a prime.

It is a super-2 number, since 2×25813457469² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25813457489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9623364 + ... + 9626045.

It is an arithmetic number, because the mean of its divisors is an integer number (3128029125).

Almost surely, 2^25813457469 is an apocalyptic number.

It is an amenable number.

25813457469 is a deficient number, since it is larger than the sum of its proper divisors (11722892031).

25813457469 is a wasteful number, since it uses less digits than its factorization.

25813457469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19249564 (or 19249561 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 25813457469 in words is "twenty-five billion, eight hundred thirteen million, four hundred fifty-seven thousand, four hundred sixty-nine".