858997799859 has 16 divisors (see below), whose sum is σ = 1146671043840. Its totient is φ = 571995047520.

The previous prime is 858997799843. The next prime is 858997799911. The reversal of 858997799859 is 958997799858.

It is not a de Polignac number, because 858997799859 - 2⁴ = 858997799843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (858997799819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26570797 + ... + 26603105.

It is an arithmetic number, because the mean of its divisors is an integer number (71666940240).

Almost surely, 2^858997799859 is an apocalyptic number.

858997799859 is a deficient number, since it is larger than the sum of its proper divisors (287673243981).

858997799859 is a wasteful number, since it uses less digits than its factorization.

858997799859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42410.

The product of its digits is 37035532800, while the sum is 93.

Subtracting 858997799859 from its reverse (958997799858), we obtain a palindrome (99999999999).

The spelling of 858997799859 in words is "eight hundred fifty-eight billion, nine hundred ninety-seven million, seven hundred ninety-nine thousand, eight hundred fifty-nine".