257401330478 has 16 divisors (see below), whose sum is σ = 409311868464. Its totient is φ = 120982485120.

The previous prime is 257401330457. The next prime is 257401330499. The reversal of 257401330478 is 874033104752.

257401330478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (257401330457) and next prime (257401330499).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4582700 + ... + 4638527.

It is an arithmetic number, because the mean of its divisors is an integer number (25581991779).

Almost surely, 2^257401330478 is an apocalyptic number.

257401330478 is a deficient number, since it is larger than the sum of its proper divisors (151910537986).

257401330478 is a wasteful number, since it uses less digits than its factorization.

257401330478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9222067.

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 257401330478 in words is "two hundred fifty-seven billion, four hundred one million, three hundred thirty thousand, four hundred seventy-eight".