82735878544421 has 24 divisors (see below), whose sum is σ = 88901383429656. Its totient is φ = 76944939061760.

The previous prime is 82735878544399. The next prime is 82735878544453. The reversal of 82735878544421 is 12444587853728.

It can be written as a sum of positive squares in 4 ways, for example, as 371995087396 + 82363883457025 = 609914^2 + 9075455^2 .

It is not a de Polignac number, because 82735878544421 - 2³⁴ = 82718698675237 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 (82735878564421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154760 + ... + 12864513.

It is an arithmetic number, because the mean of its divisors is an integer number (3704224309569).

Almost surely, 2^{82735878544421} is an apocalyptic number.

It is an amenable number.

82735878544421 is a deficient number, since it is larger than the sum of its proper divisors (6165504885235).

82735878544421 is a wasteful number, since it uses less digits than its factorization.

82735878544421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13019653 (or 13019630 counting only the distinct ones).

The product of its digits is 481689600, while the sum is 68.

The spelling of 82735878544421 in words is "eighty-two trillion, seven hundred thirty-five billion, eight hundred seventy-eight million, five hundred forty-four thousand, four hundred twenty-one".