25735478409 has 16 divisors (see below), whose sum is σ = 38173679040. Its totient is φ = 17135815680.

The previous prime is 25735478399. The next prime is 25735478411. The reversal of 25735478409 is 90487453752.

It is a happy number.

25735478409 is a `hidden beast` number, since 2 + 57 + 3 + 547 + 8 + 40 + 9 = 666.

It is not a de Polignac number, because 25735478409 - 2²⁴ = 25718701193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25735478479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565752 + ... + 609545.

It is an arithmetic number, because the mean of its divisors is an integer number (2385854940).

Almost surely, 2^25735478409 is an apocalyptic number.

It is an amenable number.

25735478409 is a deficient number, since it is larger than the sum of its proper divisors (12438200631).

25735478409 is a wasteful number, since it uses less digits than its factorization.

25735478409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176117 (or 1176111 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 25735478409 in words is "twenty-five billion, seven hundred thirty-five million, four hundred seventy-eight thousand, four hundred nine".