82704757638781 has 8 divisors (see below), whose sum is σ = 84754100285504. Its totient is φ = 80679383912160.

The previous prime is 82704757638773. The next prime is 82704757638857. The reversal of 82704757638781 is 18783675740728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82704757638781 - 2³ = 82704757638773 is a prime.

It is a super-2 number, since 2×82704757638781² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82704757638721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5992223040 + ... + 5992236841.

It is an arithmetic number, because the mean of its divisors is an integer number (10594262535688).

Almost surely, 2^{82704757638781} is an apocalyptic number.

It is an amenable number.

82704757638781 is a deficient number, since it is larger than the sum of its proper divisors (2049342646723).

82704757638781 is a wasteful number, since it uses less digits than its factorization.

82704757638781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11984460051.

The product of its (nonzero) digits is 885104640, while the sum is 73.

The spelling of 82704757638781 in words is "eighty-two trillion, seven hundred four billion, seven hundred fifty-seven million, six hundred thirty-eight thousand, seven hundred eighty-one".