83636548301021 has 4 divisors (see below), whose sum is σ = 84069898292412. Its totient is φ = 83203198309632.

The previous prime is 83636548300993. The next prime is 83636548301041. The reversal of 83636548301021 is 12010384563638.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54523293552121 + 29113254748900 = 7383989^2 + 5395670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83636548301021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83636548301041) 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, 216674995406 + ... + 216674995791.

It is an arithmetic number, because the mean of its divisors is an integer number (21017474573103).

Almost surely, 2^{83636548301021} is an apocalyptic number.

It is an amenable number.

83636548301021 is a deficient number, since it is larger than the sum of its proper divisors (433349991391).

83636548301021 is a wasteful number, since it uses less digits than its factorization.

83636548301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433349991390.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 83636548301021 in words is "eighty-three trillion, six hundred thirty-six billion, five hundred forty-eight million, three hundred one thousand, twenty-one".