84537744746321 has 4 divisors (see below), whose sum is σ = 84537773906532. Its totient is φ = 84537715586112.

The previous prime is 84537744746317. The next prime is 84537744746393. The reversal of 84537744746321 is 12364744773548.

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 79428449605696 + 5109295140625 = 8912264^2 + 2260375^2 .

It is a cyclic number.

It is not a de Polignac number, because 84537744746321 - 2² = 84537744746317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84537744646321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9683276 + ... + 16212381.

It is an arithmetic number, because the mean of its divisors is an integer number (21134443476633).

Almost surely, 2^{84537744746321} is an apocalyptic number.

It is an amenable number.

84537744746321 is a deficient number, since it is larger than the sum of its proper divisors (29160211).

84537744746321 is a wasteful number, since it uses less digits than its factorization.

84537744746321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29160210.

The product of its digits is 379330560, while the sum is 65.

The spelling of 84537744746321 in words is "eighty-four trillion, five hundred thirty-seven billion, seven hundred forty-four million, seven hundred forty-six thousand, three hundred twenty-one".