84109836194 has 4 divisors (see below), whose sum is σ = 126164754294. Its totient is φ = 42054918096.

The previous prime is 84109836149. The next prime is 84109836221. The reversal of 84109836194 is 49163890148.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 55031060569 + 29078775625 = 234587^2 + 170525^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21027459047 + ... + 21027459050.

Almost surely, 2^84109836194 is an apocalyptic number.

84109836194 is a deficient number, since it is larger than the sum of its proper divisors (42054918100).

84109836194 is a wasteful number, since it uses less digits than its factorization.

84109836194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42054918099.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 84109836194 in words is "eighty-four billion, one hundred nine million, eight hundred thirty-six thousand, one hundred ninety-four".