83784225921 has 16 divisors (see below), whose sum is σ = 121891531008. Its totient is φ = 50768499600.

The previous prime is 83784225911. The next prime is 83784225937. The reversal of 83784225921 is 12952248738.

It is not a de Polignac number, because 83784225921 - 2⁷ = 83784225793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83784225911) 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 in 15 ways as a sum of consecutive naturals, for example, 70375 + ... + 415356.

It is an arithmetic number, because the mean of its divisors is an integer number (7618220688).

Almost surely, 2^83784225921 is an apocalyptic number.

It is an amenable number.

83784225921 is a deficient number, since it is larger than the sum of its proper divisors (38107305087).

83784225921 is a wasteful number, since it uses less digits than its factorization.

83784225921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490972.

The product of its digits is 1935360, while the sum is 51.

The spelling of 83784225921 in words is "eighty-three billion, seven hundred eighty-four million, two hundred twenty-five thousand, nine hundred twenty-one".