84645400019 has 4 divisors (see below), whose sum is σ = 84652233720. Its totient is φ = 84638566320.

The previous prime is 84645400001. The next prime is 84645400067. The reversal of 84645400019 is 91000454648.

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

It is a cyclic number.

It is not a de Polignac number, because 84645400019 - 2⁸ = 84645399763 is a prime.

It is a super-2 number, since 2×84645400019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84645400069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3398237 + ... + 3423054.

It is an arithmetic number, because the mean of its divisors is an integer number (21163058430).

Almost surely, 2^84645400019 is an apocalyptic number.

84645400019 is a deficient number, since it is larger than the sum of its proper divisors (6833701).

84645400019 is a wasteful number, since it uses less digits than its factorization.

84645400019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6833700.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 84645400019 in words is "eighty-four billion, six hundred forty-five million, four hundred thousand, nineteen".