257142856379 has 2 divisors, whose sum is σ = 257142856380. Its totient is φ = 257142856378.

The previous prime is 257142856367. The next prime is 257142856403. The reversal of 257142856379 is 973658241752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257142856379 - 2⁸ = 257142856123 is a prime.

It is a super-2 number, since 2×257142856379² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (257142856309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128571428189 + 128571428190.

It is an arithmetic number, because the mean of its divisors is an integer number (128571428190).

Almost surely, 2^257142856379 is an apocalyptic number.

257142856379 is a deficient number, since it is larger than the sum of its proper divisors (1).

257142856379 is an equidigital number, since it uses as much as digits as its factorization.

257142856379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25401600, while the sum is 59.

The spelling of 257142856379 in words is "two hundred fifty-seven billion, one hundred forty-two million, eight hundred fifty-six thousand, three hundred seventy-nine".