2777778888888 has 64 divisors (see below), whose sum is σ = 6982455859200. Its totient is φ = 920860773120.

The previous prime is 2777778888769. The next prime is 2777778888923. The reversal of 2777778888888 is 8888888777772.

It is a Cunningham number, because it is equal to 1666667²-1.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19930548 + ... + 20069436.

It is an arithmetic number, because the mean of its divisors is an integer number (109100872800).

Almost surely, 2^{2777778888888} is an apocalyptic number.

It is an amenable number.

2777778888888 is an abundant number, since it is smaller than the sum of its proper divisors (4204676970312).

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

2777778888888 is a wasteful number, since it uses less digits than its factorization.

2777778888888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143452 (or 143448 counting only the distinct ones).

The product of its digits is 70493667328, while the sum is 93.

The spelling of 2777778888888 in words is "two trillion, seven hundred seventy-seven billion, seven hundred seventy-eight million, eight hundred eighty-eight thousand, eight hundred eighty-eight".