856779004898 has 32 divisors (see below), whose sum is σ = 1382730321024. Its totient is φ = 396732241152.

The previous prime is 856779004889. The next prime is 856779004931. The reversal of 856779004898 is 898400977658.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229340 + ... + 1328967.

It is an arithmetic number, because the mean of its divisors is an integer number (43210322532).

Almost surely, 2^856779004898 is an apocalyptic number.

856779004898 is a deficient number, since it is larger than the sum of its proper divisors (525951316126).

856779004898 is a wasteful number, since it uses less digits than its factorization.

856779004898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558586.

The product of its (nonzero) digits is 243855360, while the sum is 71.

The spelling of 856779004898 in words is "eight hundred fifty-six billion, seven hundred seventy-nine million, four thousand, eight hundred ninety-eight".