858747747858 has 96 divisors (see below), whose sum is σ = 2347186766400. Its totient is φ = 205893555840.

The previous prime is 858747747839. The next prime is 858747747859.

858747747858 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is not an unprimeable number, because it can be changed into a prime (858747747859) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10170933 + ... + 10255016.

It is an arithmetic number, because the mean of its divisors is an integer number (24449862150).

Almost surely, 2^858747747858 is an apocalyptic number.

858747747858 is an abundant number, since it is smaller than the sum of its proper divisors (1488439018542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

858747747858 is a wasteful number, since it uses less digits than its factorization.

858747747858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20425992 (or 20425985 counting only the distinct ones).

The product of its digits is 3933798400, while the sum is 78.

The spelling of 858747747858 in words is "eight hundred fifty-eight billion, seven hundred forty-seven million, seven hundred forty-seven thousand, eight hundred fifty-eight".