82787784306673 has 4 divisors (see below), whose sum is σ = 82787844374128. Its totient is φ = 82787724239220.

The previous prime is 82787784306637. The next prime is 82787784306707. The reversal of 82787784306673 is 37660348778728.

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-82787784306673 is a prime.

It is a super-3 number, since 3×82787784306673³ (a number of 43 digits) contains 333 as substring.

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 82787784306673.

It is not an unprimeable number, because it can be changed into a prime (82787784306973) 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, 27916611 + ... + 30739432.

It is an arithmetic number, because the mean of its divisors is an integer number (20696961093532).

Almost surely, 2^{82787784306673} is an apocalyptic number.

It is an amenable number.

82787784306673 is a deficient number, since it is larger than the sum of its proper divisors (60067455).

82787784306673 is a wasteful number, since it uses less digits than its factorization.

82787784306673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60067454.

The product of its (nonzero) digits is 3186376704, while the sum is 76.

The spelling of 82787784306673 in words is "eighty-two trillion, seven hundred eighty-seven billion, seven hundred eighty-four million, three hundred six thousand, six hundred seventy-three".