257142856308 has 24 divisors (see below), whose sum is σ = 646153844448. Its totient is φ = 79120878816.

The previous prime is 257142856291. The next prime is 257142856309. The reversal of 257142856308 is 803658241752.

It is a super-2 number, since 2×257142856308² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257142856309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824175666 + ... + 824175977.

It is an arithmetic number, because the mean of its divisors is an integer number (26923076852).

Almost surely, 2^257142856308 is an apocalyptic number.

It is an amenable number.

257142856308 is an abundant number, since it is smaller than the sum of its proper divisors (389010988140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257142856308 is a wasteful number, since it uses less digits than its factorization.

257142856308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648351663 (or 1648351661 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 257142856308 in words is "two hundred fifty-seven billion, one hundred forty-two million, eight hundred fifty-six thousand, three hundred eight".