82766835561 has 4 divisors (see below), whose sum is σ = 110355780752. Its totient is φ = 55177890372.

The previous prime is 82766835559. The next prime is 82766835581. The reversal of 82766835561 is 16553866728.

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 not a de Polignac number, because 82766835561 - 2¹ = 82766835559 is a prime.

It is a super-2 number, since 2×82766835561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82766835521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13794472591 + ... + 13794472596.

It is an arithmetic number, because the mean of its divisors is an integer number (27588945188).

Almost surely, 2^82766835561 is an apocalyptic number.

It is an amenable number.

82766835561 is a deficient number, since it is larger than the sum of its proper divisors (27588945191).

82766835561 is a wasteful number, since it uses less digits than its factorization.

82766835561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27588945190.

The product of its digits is 14515200, while the sum is 57.

The spelling of 82766835561 in words is "eighty-two billion, seven hundred sixty-six million, eight hundred thirty-five thousand, five hundred sixty-one".