9872776772789 has 6 divisors (see below), whose sum is σ = 11484658694934. Its totient is φ = 8462380090920.

The previous prime is 9872776772783. The next prime is 9872776772797.

9872776772789 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 7914853822225 + 1957922950564 = 2813335^2 + 1399258^2 .

It is not a de Polignac number, because 9872776772789 - 2²⁴ = 9872759995573 is a prime.

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 9872776772789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872776772783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100742620082 + ... + 100742620179.

It is an arithmetic number, because the mean of its divisors is an integer number (1914109782489).

Almost surely, 2^{9872776772789} is an apocalyptic number.

It is an amenable number.

9872776772789 is a deficient number, since it is larger than the sum of its proper divisors (1611881922145).

9872776772789 is a wasteful number, since it uses less digits than its factorization.

9872776772789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201485240275 (or 201485240268 counting only the distinct ones).

The product of its digits is 14637417984, while the sum is 86.

The spelling of 9872776772789 in words is "nine trillion, eight hundred seventy-two billion, seven hundred seventy-six million, seven hundred seventy-two thousand, seven hundred eighty-nine".