257438085742 has 16 divisors (see below), whose sum is σ = 388056633840. Its totient is φ = 128087303488.

The previous prime is 257438085733. The next prime is 257438085743. The reversal of 257438085742 is 247580834752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257438085743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3933 + ... + 717559.

It is an arithmetic number, because the mean of its divisors is an integer number (24253539615).

Almost surely, 2^257438085742 is an apocalyptic number.

257438085742 is a deficient number, since it is larger than the sum of its proper divisors (130618548098).

257438085742 is a wasteful number, since it uses less digits than its factorization.

257438085742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714515.

The product of its (nonzero) digits is 15052800, while the sum is 55.

The spelling of 257438085742 in words is "two hundred fifty-seven billion, four hundred thirty-eight million, eighty-five thousand, seven hundred forty-two".