856948989849658 has 16 divisors (see below), whose sum is σ = 1298151948040704. Its totient is φ = 424231683627600.

The previous prime is 856948989849637. The next prime is 856948989849661.

856948989849658 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225390391 + ... + 229160917.

It is an arithmetic number, because the mean of its divisors is an integer number (81134496752544).

Almost surely, 2^{856948989849658} is an apocalyptic number.

856948989849658 is a deficient number, since it is larger than the sum of its proper divisors (441202958191046).

856948989849658 is a wasteful number, since it uses less digits than its factorization.

856948989849658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895757.

The product of its digits is 3095868211200, while the sum is 106.

The spelling of 856948989849658 in words is "eight hundred fifty-six trillion, nine hundred forty-eight billion, nine hundred eighty-nine million, eight hundred forty-nine thousand, six hundred fifty-eight".