2012655779761 has 9 divisors (see below), whose sum is σ = 2212275159129. Its totient is φ = 1829672885700.

The previous prime is 2012655779749. The next prime is 2012655779821. The reversal of 2012655779761 is 1679775562102.

The square root of 2012655779761 is 1418681.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2012655779761 - 2³³ = 2004065845169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012655779696 and 2012655779705.

It is not an unprimeable number, because it can be changed into a prime (2012655779861) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15541006 + ... + 15669976.

Almost surely, 2^{2012655779761} is an apocalyptic number.

2012655779761 is the 1418681-st square number.

2012655779761 is the 709341-st centered octagonal number.

It is an amenable number.

2012655779761 is a deficient number, since it is larger than the sum of its proper divisors (199619379368).

2012655779761 is an frugal number, since it uses more digits than its factorization.

2012655779761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257964 (or 128982 counting only the distinct ones).

The product of its (nonzero) digits is 11113200, while the sum is 58.

The spelling of 2012655779761 in words is "two trillion, twelve billion, six hundred fifty-five million, seven hundred seventy-nine thousand, seven hundred sixty-one".