257485071337 has 4 divisors (see below), whose sum is σ = 277291615300. Its totient is φ = 237678527376.

The previous prime is 257485071313. The next prime is 257485071377. The reversal of 257485071337 is 733170584752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129896088921 + 127588982416 = 360411^2 + 357196^2 .

It is a cyclic number.

It is not a de Polignac number, because 257485071337 - 2¹⁹ = 257484547049 is a prime.

It is a super-2 number, since 2×257485071337² (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 (257485071307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9903271962 + ... + 9903271987.

It is an arithmetic number, because the mean of its divisors is an integer number (69322903825).

Almost surely, 2^257485071337 is an apocalyptic number.

It is an amenable number.

257485071337 is a deficient number, since it is larger than the sum of its proper divisors (19806543963).

257485071337 is a wasteful number, since it uses less digits than its factorization.

257485071337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19806543962.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 257485071337 in words is "two hundred fifty-seven billion, four hundred eighty-five million, seventy-one thousand, three hundred thirty-seven".