257705142019 has 8 divisors (see below), whose sum is σ = 277558080912. Its totient is φ = 237856412640.

The previous prime is 257705142011. The next prime is 257705142031. The reversal of 257705142019 is 910241507752.

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 257705142019 - 2³ = 257705142011 is a prime.

It is a super-2 number, since 2×257705142019² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257705142011) 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, 924649 + ... + 1170634.

It is an arithmetic number, because the mean of its divisors is an integer number (34694760114).

Almost surely, 2^257705142019 is an apocalyptic number.

257705142019 is a deficient number, since it is larger than the sum of its proper divisors (19852938893).

257705142019 is a wasteful number, since it uses less digits than its factorization.

257705142019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104757.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 257705142019 in words is "two hundred fifty-seven billion, seven hundred five million, one hundred forty-two thousand, nineteen".