257402380321 has 8 divisors (see below), whose sum is σ = 274867948800. Its totient is φ = 240509453520.

The previous prime is 257402380307. The next prime is 257402380327. The reversal of 257402380321 is 123083204752.

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 257402380321 - 2⁵ = 257402380289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257402380327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143159491 + ... + 143161288.

It is an arithmetic number, because the mean of its divisors is an integer number (34358493600).

Almost surely, 2^257402380321 is an apocalyptic number.

It is an amenable number.

257402380321 is a deficient number, since it is larger than the sum of its proper divisors (17465568479).

257402380321 is a wasteful number, since it uses less digits than its factorization.

257402380321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286320839.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 257402380321 in words is "two hundred fifty-seven billion, four hundred two million, three hundred eighty thousand, three hundred twenty-one".