84779150818 has 4 divisors (see below), whose sum is σ = 127168726230. Its totient is φ = 42389575408.

The previous prime is 84779150809. The next prime is 84779150821. The reversal of 84779150818 is 81805197748.

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., 76196425369 + 8582725449 = 276037^2 + 92643^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21194787703 + ... + 21194787706.

Almost surely, 2^84779150818 is an apocalyptic number.

84779150818 is a deficient number, since it is larger than the sum of its proper divisors (42389575412).

84779150818 is a wasteful number, since it uses less digits than its factorization.

84779150818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42389575411.

The product of its (nonzero) digits is 4515840, while the sum is 58.

The spelling of 84779150818 in words is "eighty-four billion, seven hundred seventy-nine million, one hundred fifty thousand, eight hundred eighteen".