2777777777478 has 16 divisors (see below), whose sum is σ = 6060606060096. Its totient is φ = 841750841640.

The previous prime is 2777777777473. The next prime is 2777777777503. The reversal of 2777777777478 is 8747777777772.

It is a self number, because there is not a number n which added to its sum of digits gives 2777777777478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2777777777473) 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, 21043770976 + ... + 21043771107.

It is an arithmetic number, because the mean of its divisors is an integer number (378787878756).

Almost surely, 2^{2777777777478} is an apocalyptic number.

2777777777478 is an abundant number, since it is smaller than the sum of its proper divisors (3282828282618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2777777777478 is a wasteful number, since it uses less digits than its factorization.

2777777777478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42087542099.

The product of its digits is 18078415936, while the sum is 84.

The spelling of 2777777777478 in words is "two trillion, seven hundred seventy-seven billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, four hundred seventy-eight".