857921547226 has 16 divisors (see below), whose sum is σ = 1336328192808. Its totient is φ = 412765459200.

The previous prime is 857921547193. The next prime is 857921547229. The reversal of 857921547226 is 622745129758.

It can be written as a sum of positive squares in 4 ways, for example, as 341758329201 + 516163218025 = 584601^2 + 718445^2 .

It is not an unprimeable number, because it can be changed into a prime (857921547229) 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, 71654685 + ... + 71666656.

Almost surely, 2^857921547226 is an apocalyptic number.

857921547226 is a deficient number, since it is larger than the sum of its proper divisors (478406645582).

857921547226 is a wasteful number, since it uses less digits than its factorization.

857921547226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143321457.

The product of its digits is 16934400, while the sum is 58.

The spelling of 857921547226 in words is "eight hundred fifty-seven billion, nine hundred twenty-one million, five hundred forty-seven thousand, two hundred twenty-six".