257423734720 has 28 divisors (see below), whose sum is σ = 612990269064. Its totient is φ = 102969493760.

The previous prime is 257423734709. The next prime is 257423734721. The reversal of 257423734720 is 27437324752.

257423734720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257423734721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402224266 + ... + 402224905.

Almost surely, 2^257423734720 is an apocalyptic number.

257423734720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257423734720 is an abundant number, since it is smaller than the sum of its proper divisors (355566534344).

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

257423734720 is an equidigital number, since it uses as much as digits as its factorization.

257423734720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804449188 (or 804449178 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 46.

The spelling of 257423734720 in words is "two hundred fifty-seven billion, four hundred twenty-three million, seven hundred thirty-four thousand, seven hundred twenty".