9772872877261 has 8 divisors (see below), whose sum is σ = 11143728348984. Its totient is φ = 8490459694080.

The previous prime is 9772872877219. The next prime is 9772872877283. The reversal of 9772872877261 is 1627782782779.

It can be written as a sum of positive squares in 4 ways, for example, as 3180893652036 + 6591979225225 = 1783506^2 + 2567485^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9772872877261 - 2⁹ = 9772872876749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9772872877661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22110571900 + ... + 22110572341.

It is an arithmetic number, because the mean of its divisors is an integer number (1392966043623).

Almost surely, 2^{9772872877261} is an apocalyptic number.

It is an amenable number.

9772872877261 is a deficient number, since it is larger than the sum of its proper divisors (1370855471723).

9772872877261 is a wasteful number, since it uses less digits than its factorization.

9772872877261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44221144271.

The product of its digits is 464679936, while the sum is 73.

The spelling of 9772872877261 in words is "nine trillion, seven hundred seventy-two billion, eight hundred seventy-two million, eight hundred seventy-seven thousand, two hundred sixty-one".