257066198016 has 88 divisors (see below), whose sum is σ = 685509906144. Its totient is φ = 85646868480.

The previous prime is 257066197979. The next prime is 257066198021. The reversal of 257066198016 is 610891660752.

It is a self number, because there is not a number n which added to its sum of digits gives 257066198016.

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, 6619231 + ... + 6657953.

Almost surely, 2^257066198016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257066198016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342754953072).

257066198016 is an abundant number, since it is smaller than the sum of its proper divisors (428443708128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257066198016 is a wasteful number, since it uses less digits than its factorization.

257066198016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40907 (or 40889 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 257066198016 in words is "two hundred fifty-seven billion, sixty-six million, one hundred ninety-eight thousand, sixteen".