257297358379 has 8 divisors (see below), whose sum is σ = 258690761280. Its totient is φ = 255907667400.

The previous prime is 257297358377. The next prime is 257297358391. The reversal of 257297358379 is 973853792752.

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 257297358379 - 2¹ = 257297358377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257297358377) 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, 788917 + ... + 1066294.

It is an arithmetic number, because the mean of its divisors is an integer number (32336345160).

Almost surely, 2^257297358379 is an apocalyptic number.

257297358379 is a deficient number, since it is larger than the sum of its proper divisors (1393402901).

257297358379 is a wasteful number, since it uses less digits than its factorization.

257297358379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855961.

The product of its digits is 200037600, while the sum is 67.

The spelling of 257297358379 in words is "two hundred fifty-seven billion, two hundred ninety-seven million, three hundred fifty-eight thousand, three hundred seventy-nine".