2777005081 has 4 divisors (see below), whose sum is σ = 2777182564. Its totient is φ = 2776827600.

The previous prime is 2777005031. The next prime is 2777005087. The reversal of 2777005081 is 1805007772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2032206400 + 744798681 = 45080^2 + 27291^2 .

It is a cyclic number.

It is not a de Polignac number, because 2777005081 - 2⁹ = 2777004569 is a prime.

It is a super-2 number, since 2×2777005081² = 15423514439799633122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2777005081.

It is not an unprimeable number, because it can be changed into a prime (2777005087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62730 + ... + 97411.

It is an arithmetic number, because the mean of its divisors is an integer number (694295641).

Almost surely, 2^2777005081 is an apocalyptic number.

It is an amenable number.

2777005081 is a deficient number, since it is larger than the sum of its proper divisors (177483).

2777005081 is a wasteful number, since it uses less digits than its factorization.

2777005081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177482.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 2777005081 is about 52697.2967143477. The cubic root of 2777005081 is about 1405.5907532079.

The spelling of 2777005081 in words is "two billion, seven hundred seventy-seven million, five thousand, eighty-one".