82777532775 has 24 divisors (see below), whose sum is σ = 156410120064. Its totient is φ = 37841157600.

The previous prime is 82777532771. The next prime is 82777532777. The reversal of 82777532775 is 57723577728.

It is a happy number.

It is not a de Polignac number, because 82777532775 - 2² = 82777532771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82777532771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78835221 + ... + 78836270.

It is an arithmetic number, because the mean of its divisors is an integer number (6517088336).

Almost surely, 2^82777532775 is an apocalyptic number.

82777532775 is a deficient number, since it is larger than the sum of its proper divisors (73632587289).

82777532775 is a wasteful number, since it uses less digits than its factorization.

82777532775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157671511 (or 157671506 counting only the distinct ones).

The product of its digits is 40336800, while the sum is 60.

The spelling of 82777532775 in words is "eighty-two billion, seven hundred seventy-seven million, five hundred thirty-two thousand, seven hundred seventy-five".