84400398771 has 32 divisors (see below), whose sum is σ = 121709575680. Its totient is φ = 51716448000.

The previous prime is 84400398757. The next prime is 84400398773. The reversal of 84400398771 is 17789300448.

It is not a de Polignac number, because 84400398771 - 2⁵ = 84400398739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84400398773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27954900 + ... + 27957918.

It is an arithmetic number, because the mean of its divisors is an integer number (3803424240).

Almost surely, 2^84400398771 is an apocalyptic number.

84400398771 is a deficient number, since it is larger than the sum of its proper divisors (37309176909).

84400398771 is a wasteful number, since it uses less digits than its factorization.

84400398771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 84400398771 in words is "eighty-four billion, four hundred million, three hundred ninety-eight thousand, seven hundred seventy-one".