82780730633 has 4 divisors (see below), whose sum is σ = 82781327568. Its totient is φ = 82780133700.

The previous prime is 82780730587. The next prime is 82780730639. The reversal of 82780730633 is 33603708728.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 82780730633 - 2¹² = 82780726537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82780730639) 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, 30158 + ... + 408008.

It is an arithmetic number, because the mean of its divisors is an integer number (20695331892).

Almost surely, 2^82780730633 is an apocalyptic number.

It is an amenable number.

82780730633 is a deficient number, since it is larger than the sum of its proper divisors (596935).

82780730633 is a wasteful number, since it uses less digits than its factorization.

82780730633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596934.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 82780730633 in words is "eighty-two billion, seven hundred eighty million, seven hundred thirty thousand, six hundred thirty-three".