857441894399 has 4 divisors (see below), whose sum is σ = 862232072760. Its totient is φ = 852651716040.

The previous prime is 857441894369. The next prime is 857441894437. The reversal of 857441894399 is 993498144758.

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 857441894399 - 2¹² = 857441890303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857441894369) 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, 2395088912 + ... + 2395089269.

It is an arithmetic number, because the mean of its divisors is an integer number (215558018190).

Almost surely, 2^857441894399 is an apocalyptic number.

857441894399 is a deficient number, since it is larger than the sum of its proper divisors (4790178361).

857441894399 is a wasteful number, since it uses less digits than its factorization.

857441894399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790178360.

The product of its digits is 313528320, while the sum is 71.

The spelling of 857441894399 in words is "eight hundred fifty-seven billion, four hundred forty-one million, eight hundred ninety-four thousand, three hundred ninety-nine".