2777778888897 has 8 divisors (see below), whose sum is σ = 3711953973600. Its totient is φ = 1847728198400.

The previous prime is 2777778888769. The next prime is 2777778888923. The reversal of 2777778888897 is 7988888777772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2777778888897 - 2⁷ = 2777778888769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2777778888897.

It is not an unprimeable number, because it can be changed into a prime (2777778838897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031096979 + ... + 1031099672.

It is an arithmetic number, because the mean of its divisors is an integer number (463994246700).

Almost surely, 2^{2777778888897} is an apocalyptic number.

It is an amenable number.

2777778888897 is a deficient number, since it is larger than the sum of its proper divisors (934175084703).

2777778888897 is a wasteful number, since it uses less digits than its factorization.

2777778888897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062197103.

The product of its digits is 69392203776, while the sum is 93.

The spelling of 2777778888897 in words is "two trillion, seven hundred seventy-seven billion, seven hundred seventy-eight million, eight hundred eighty-eight thousand, eight hundred ninety-seven".