2778777889004 has 36 divisors (see below), whose sum is σ = 5319987599304. Its totient is φ = 1269291059712.

The previous prime is 2778777888967. The next prime is 2778777889007. The reversal of 2778777889004 is 4009887778772.

It is a super-2 number, since 2×2778777889004² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2778777889007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21123182 + ... + 21254325.

It is an arithmetic number, because the mean of its divisors is an integer number (147777433314).

Almost surely, 2^{2778777889004} is an apocalyptic number.

It is an amenable number.

2778777889004 is a deficient number, since it is larger than the sum of its proper divisors (2541209710300).

2778777889004 is a wasteful number, since it uses less digits than its factorization.

2778777889004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42377634 (or 42377619 counting only the distinct ones).

The product of its (nonzero) digits is 619573248, while the sum is 74.

The spelling of 2778777889004 in words is "two trillion, seven hundred seventy-eight billion, seven hundred seventy-seven million, eight hundred eighty-nine thousand, four".