82045639393 has 4 divisors (see below), whose sum is σ = 86363830960. Its totient is φ = 77727447828.

The previous prime is 82045639387. The next prime is 82045639397. The reversal of 82045639393 is 39393654028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82045639393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82045639393.

It is not an unprimeable number, because it can be changed into a prime (82045639397) 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 3 ways as a sum of consecutive naturals, for example, 2159095755 + ... + 2159095792.

It is an arithmetic number, because the mean of its divisors is an integer number (21590957740).

Almost surely, 2^82045639393 is an apocalyptic number.

It is an amenable number.

82045639393 is a deficient number, since it is larger than the sum of its proper divisors (4318191567).

82045639393 is a wasteful number, since it uses less digits than its factorization.

82045639393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318191566.

The product of its (nonzero) digits is 4199040, while the sum is 52.

It can be divided in two parts, 8204563 and 9393, that added together give a square (8213956 = 2866²).

The spelling of 82045639393 in words is "eighty-two billion, forty-five million, six hundred thirty-nine thousand, three hundred ninety-three".