257458107478 has 64 divisors (see below), whose sum is σ = 463693289472. Its totient is φ = 105648958080.

The previous prime is 257458107461. The next prime is 257458107481. The reversal of 257458107478 is 874701854752.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20734800 + ... + 20747212.

It is an arithmetic number, because the mean of its divisors is an integer number (7245207648).

Almost surely, 2^257458107478 is an apocalyptic number.

257458107478 is a deficient number, since it is larger than the sum of its proper divisors (206235181994).

257458107478 is a wasteful number, since it uses less digits than its factorization.

257458107478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14029.

The product of its (nonzero) digits is 17561600, while the sum is 58.

The spelling of 257458107478 in words is "two hundred fifty-seven billion, four hundred fifty-eight million, one hundred seven thousand, four hundred seventy-eight".