84539490818 has 4 divisors (see below), whose sum is σ = 126809236230. Its totient is φ = 42269745408.

The previous prime is 84539490779. The next prime is 84539490839. The reversal of 84539490818 is 81809493548.

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., 54352860769 + 30186630049 = 233137^2 + 173743^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21134872703 + ... + 21134872706.

Almost surely, 2^84539490818 is an apocalyptic number.

84539490818 is a deficient number, since it is larger than the sum of its proper divisors (42269745412).

84539490818 is a wasteful number, since it uses less digits than its factorization.

84539490818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42269745411.

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 84539490818 in words is "eighty-four billion, five hundred thirty-nine million, four hundred ninety thousand, eight hundred eighteen".