257055402733770 has 128 divisors (see below), whose sum is σ = 677674305884160. Its totient is φ = 62113496163840.

The previous prime is 257055402733741. The next prime is 257055402733783. The reversal of 257055402733770 is 77337204550752.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 257055402733770.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 248981262 + ... + 250011558.

It is an arithmetic number, because the mean of its divisors is an integer number (5294330514720).

Almost surely, 2^{257055402733770} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257055402733770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338837152942080).

257055402733770 is an abundant number, since it is smaller than the sum of its proper divisors (420618903150390).

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

257055402733770 is a wasteful number, since it uses less digits than its factorization.

257055402733770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049380.

The product of its (nonzero) digits is 43218000, while the sum is 57.

The spelling of 257055402733770 in words is "two hundred fifty-seven trillion, fifty-five billion, four hundred two million, seven hundred thirty-three thousand, seven hundred seventy".