857885636099 has 4 divisors (see below), whose sum is σ = 908349497064. Its totient is φ = 807421775136.

The previous prime is 857885636081. The next prime is 857885636141. The reversal of 857885636099 is 990636588758.

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 857885636099 - 2³² = 853590668803 is a prime.

It is a super-3 number, since 3×857885636099³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857885636899) 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, 25231930457 + ... + 25231930490.

It is an arithmetic number, because the mean of its divisors is an integer number (227087374266).

Almost surely, 2^857885636099 is an apocalyptic number.

857885636099 is a deficient number, since it is larger than the sum of its proper divisors (50463860965).

857885636099 is a wasteful number, since it uses less digits than its factorization.

857885636099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50463860964.

The product of its (nonzero) digits is 783820800, while the sum is 74.

The spelling of 857885636099 in words is "eight hundred fifty-seven billion, eight hundred eighty-five million, six hundred thirty-six thousand, ninety-nine".