2768205781 has 8 divisors (see below), whose sum is σ = 3026592000. Its totient is φ = 2510941440.

The previous prime is 2768205757. The next prime is 2768205793. The reversal of 2768205781 is 1875028672.

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

It is a cyclic number.

It is not a de Polignac number, because 2768205781 - 2²¹ = 2766108629 is a prime.

It is a super-2 number, since 2×2768205781² = 15325926491923639922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2768200781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275301 + ... + 285178.

It is an arithmetic number, because the mean of its divisors is an integer number (378324000).

Almost surely, 2^2768205781 is an apocalyptic number.

It is an amenable number.

2768205781 is a deficient number, since it is larger than the sum of its proper divisors (258386219).

2768205781 is a wasteful number, since it uses less digits than its factorization.

2768205781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560939.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 2768205781 is about 52613.7413704823. The cubic root of 2768205781 is about 1404.1045836562.

The spelling of 2768205781 in words is "two billion, seven hundred sixty-eight million, two hundred five thousand, seven hundred eighty-one".