257423207447 has 8 divisors (see below), whose sum is σ = 294245892096. Its totient is φ = 220612507992.

The previous prime is 257423207429. The next prime is 257423207453. The reversal of 257423207447 is 744702324752.

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 257423207447 - 2¹⁴ = 257423191063 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 (257423207407) 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, 2950223 + ... + 3036224.

It is an arithmetic number, because the mean of its divisors is an integer number (36780736512).

Almost surely, 2^257423207447 is an apocalyptic number.

257423207447 is a deficient number, since it is larger than the sum of its proper divisors (36822684649).

257423207447 is an equidigital number, since it uses as much as digits as its factorization.

257423207447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5992597.

The product of its (nonzero) digits is 2634240, while the sum is 47.

The spelling of 257423207447 in words is "two hundred fifty-seven billion, four hundred twenty-three million, two hundred seven thousand, four hundred forty-seven".