25653457789 has 8 divisors (see below), whose sum is σ = 26618414648. Its totient is φ = 24702796800.

The previous prime is 25653457787. The next prime is 25653457831. The reversal of 25653457789 is 98775435652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11207821689 + 14445636100 = 105867^2 + 120190^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25653457789 - 2¹ = 25653457787 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 (25653457783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3570312 + ... + 3577489.

It is an arithmetic number, because the mean of its divisors is an integer number (3327301831).

Almost surely, 2^25653457789 is an apocalyptic number.

It is an amenable number.

25653457789 is a deficient number, since it is larger than the sum of its proper divisors (964956859).

25653457789 is an equidigital number, since it uses as much as digits as its factorization.

25653457789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147935.

The product of its digits is 63504000, while the sum is 61.

The spelling of 25653457789 in words is "twenty-five billion, six hundred fifty-three million, four hundred fifty-seven thousand, seven hundred eighty-nine".