25839475657 has 8 divisors (see below), whose sum is σ = 27207230400. Its totient is φ = 24472499184.

The previous prime is 25839475583. The next prime is 25839475723. The reversal of 25839475657 is 75657493852.

It is a happy number.

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 25839475657 - 2²³ = 25831087049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25839475595 and 25839475604.

It is not an unprimeable number, because it can be changed into a prime (25839475157) 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, 125782 + ... + 259807.

It is an arithmetic number, because the mean of its divisors is an integer number (3400903800).

Almost surely, 2^25839475657 is an apocalyptic number.

It is an amenable number.

25839475657 is a deficient number, since it is larger than the sum of its proper divisors (1367754743).

25839475657 is a wasteful number, since it uses less digits than its factorization.

25839475657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389135.

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

The spelling of 25839475657 in words is "twenty-five billion, eight hundred thirty-nine million, four hundred seventy-five thousand, six hundred fifty-seven".