2805631816772 has 12 divisors (see below), whose sum is σ = 4945694042940. Its totient is φ = 1392576375936.

The previous prime is 2805631816703. The next prime is 2805631816787. The reversal of 2805631816772 is 2776181365082.

It can be written as a sum of positive squares in 2 ways, for example, as 1722567001156 + 1083064815616 = 1312466^2 + 1040704^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2559882497 + ... + 2559883592.

It is an arithmetic number, because the mean of its divisors is an integer number (412141170245).

Almost surely, 2^{2805631816772} is an apocalyptic number.

It is an amenable number.

2805631816772 is a deficient number, since it is larger than the sum of its proper divisors (2140062226168).

2805631816772 is a wasteful number, since it uses less digits than its factorization.

2805631816772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119766230 (or 5119766228 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 2805631816772 in words is "two trillion, eight hundred five billion, six hundred thirty-one million, eight hundred sixteen thousand, seven hundred seventy-two".