257686047070 has 32 divisors (see below), whose sum is σ = 488721185280. Its totient is φ = 97554661920.

The previous prime is 257686046951. The next prime is 257686047077. The reversal of 257686047070 is 70740686752.

It is a junction number, because it is equal to n+sod(n) for n = 257686046999 and 257686047017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257686047077) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 461842 + ... + 853621.

It is an arithmetic number, because the mean of its divisors is an integer number (15272537040).

Almost surely, 2^257686047070 is an apocalyptic number.

257686047070 is a deficient number, since it is larger than the sum of its proper divisors (231035138210).

257686047070 is a wasteful number, since it uses less digits than its factorization.

257686047070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316520.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 257686047070 in words is "two hundred fifty-seven billion, six hundred eighty-six million, forty-seven thousand, seventy".