257285312639 has 8 divisors (see below), whose sum is σ = 257865154560. Its totient is φ = 256705985016.

The previous prime is 257285312573. The next prime is 257285312659. The reversal of 257285312639 is 936213582752.

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 257285312639 - 2¹⁶ = 257285247103 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 (257285312659) 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, 882002 + ... + 1136880.

It is an arithmetic number, because the mean of its divisors is an integer number (32233144320).

Almost surely, 2^257285312639 is an apocalyptic number.

257285312639 is a deficient number, since it is larger than the sum of its proper divisors (579841921).

257285312639 is a wasteful number, since it uses less digits than its factorization.

257285312639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257149.

The product of its digits is 5443200, while the sum is 53.

The spelling of 257285312639 in words is "two hundred fifty-seven billion, two hundred eighty-five million, three hundred twelve thousand, six hundred thirty-nine".