2777777777377 has 4 divisors (see below), whose sum is σ = 2845528454916. Its totient is φ = 2710027099840.

The previous prime is 2777777777303. The next prime is 2777777777417. The reversal of 2777777777377 is 7737777777772.

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 176795861841 + 2600981915536 = 420471^2 + 1612756^2 .

It is a cyclic number.

It is not a de Polignac number, because 2777777777377 - 2⁷ = 2777777777249 is a prime.

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 2777777777377.

It is not an unprimeable number, because it can be changed into a prime (2777777787377) 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, 33875338708 + ... + 33875338789.

It is an arithmetic number, because the mean of its divisors is an integer number (711382113729).

Almost surely, 2^{2777777777377} is an apocalyptic number.

It is an amenable number.

2777777777377 is a deficient number, since it is larger than the sum of its proper divisors (67750677539).

2777777777377 is an equidigital number, since it uses as much as digits as its factorization.

2777777777377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67750677538.

The product of its digits is 11863960458, while the sum is 82.

The spelling of 2777777777377 in words is "two trillion, seven hundred seventy-seven billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, three hundred seventy-seven".