857228831959 has 4 divisors (see below), whose sum is σ = 857249437104. Its totient is φ = 857208226816.

The previous prime is 857228831939. The next prime is 857228831969. The reversal of 857228831959 is 959138822758.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 857228831959 - 2¹⁵ = 857228799191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857228831894 and 857228831903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857228831909) 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, 10240042 + ... + 10323415.

It is an arithmetic number, because the mean of its divisors is an integer number (214312359276).

Almost surely, 2^857228831959 is an apocalyptic number.

857228831959 is a deficient number, since it is larger than the sum of its proper divisors (20605145).

857228831959 is a wasteful number, since it uses less digits than its factorization.

857228831959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20605144.

The product of its digits is 87091200, while the sum is 67.

The spelling of 857228831959 in words is "eight hundred fifty-seven billion, two hundred twenty-eight million, eight hundred thirty-one thousand, nine hundred fifty-nine".