84155031794 has 4 divisors (see below), whose sum is σ = 126232547694. Its totient is φ = 42077515896.

The previous prime is 84155031773. The next prime is 84155031799. The reversal of 84155031794 is 49713055148.

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., 83292846025 + 862185769 = 288605^2 + 29363^2 .

It is not an unprimeable number, because it can be changed into a prime (84155031799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21038757947 + ... + 21038757950.

Almost surely, 2^84155031794 is an apocalyptic number.

84155031794 is a deficient number, since it is larger than the sum of its proper divisors (42077515900).

84155031794 is a wasteful number, since it uses less digits than its factorization.

84155031794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42077515899.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 84155031794 in words is "eighty-four billion, one hundred fifty-five million, thirty-one thousand, seven hundred ninety-four".