857742981268 has 24 divisors (see below), whose sum is σ = 1569084769280. Its totient is φ = 409783289760.

The previous prime is 857742981241. The next prime is 857742981281. The reversal of 857742981268 is 862189247758.

It is a congruent number.

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, 43770471 + ... + 43790062.

Almost surely, 2^857742981268 is an apocalyptic number.

It is an amenable number.

857742981268 is a deficient number, since it is larger than the sum of its proper divisors (711341788012).

857742981268 is a wasteful number, since it uses less digits than its factorization.

857742981268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87560647 (or 87560645 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 67.

The spelling of 857742981268 in words is "eight hundred fifty-seven billion, seven hundred forty-two million, nine hundred eighty-one thousand, two hundred sixty-eight".