2105720276777 has 16 divisors (see below), whose sum is σ = 2276784461952. Its totient is φ = 1935966009600.

The previous prime is 2105720276731. The next prime is 2105720276809. The reversal of 2105720276777 is 7776720275012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2105720276777 - 2⁸ = 2105720276521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105720273777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3987902 + ... + 4484952.

It is an arithmetic number, because the mean of its divisors is an integer number (142299028872).

Almost surely, 2^{2105720276777} is an apocalyptic number.

It is an amenable number.

2105720276777 is a deficient number, since it is larger than the sum of its proper divisors (171064185175).

2105720276777 is a wasteful number, since it uses less digits than its factorization.

2105720276777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498368.

The product of its (nonzero) digits is 4033680, while the sum is 53.

The spelling of 2105720276777 in words is "two trillion, one hundred five billion, seven hundred twenty million, two hundred seventy-six thousand, seven hundred seventy-seven".