82137879217453 has 4 divisors (see below), whose sum is σ = 82137906930268. Its totient is φ = 82137851504640.

The previous prime is 82137879217423. The next prime is 82137879217469. The reversal of 82137879217453 is 35471297873128.

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 80446781839369 + 1691097378084 = 8969213^2 + 1300422^2 .

It is a cyclic number.

It is not a de Polignac number, because 82137879217453 - 2¹³ = 82137879209261 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 (82137879217423) 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, 8794068 + ... + 15543853.

It is an arithmetic number, because the mean of its divisors is an integer number (20534476732567).

Almost surely, 2^{82137879217453} is an apocalyptic number.

It is an amenable number.

82137879217453 is a deficient number, since it is larger than the sum of its proper divisors (27712815).

82137879217453 is a wasteful number, since it uses less digits than its factorization.

82137879217453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27712814.

The product of its digits is 142248960, while the sum is 67.

The spelling of 82137879217453 in words is "eighty-two trillion, one hundred thirty-seven billion, eight hundred seventy-nine million, two hundred seventeen thousand, four hundred fifty-three".