2778688211052 has 48 divisors (see below), whose sum is σ = 6985884457440. Its totient is φ = 854547552768.

The previous prime is 2778688211017. The next prime is 2778688211081. The reversal of 2778688211052 is 2501128868772.

It is a happy number.

2778688211052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2778688211052² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2778688210983 and 2778688211001.

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, 4206177 + ... + 4821752.

It is an arithmetic number, because the mean of its divisors is an integer number (145539259530).

Almost surely, 2^{2778688211052} is an apocalyptic number.

It is an amenable number.

2778688211052 is an abundant number, since it is smaller than the sum of its proper divisors (4207196246388).

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

2778688211052 is a wasteful number, since it uses less digits than its factorization.

2778688211052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9029922 (or 9029920 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 57.

The spelling of 2778688211052 in words is "two trillion, seven hundred seventy-eight billion, six hundred eighty-eight million, two hundred eleven thousand, fifty-two".