2777778888797 has 4 divisors (see below), whose sum is σ = 3030304242336. Its totient is φ = 2525253535260.

The previous prime is 2777778888769. The next prime is 2777778888923. The reversal of 2777778888797 is 7978888777772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2777778888797 - 2¹⁰ = 2777778887773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2777778882797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126262676753 + ... + 126262676774.

It is an arithmetic number, because the mean of its divisors is an integer number (757576060584).

Almost surely, 2^{2777778888797} is an apocalyptic number.

It is an amenable number.

2777778888797 is a deficient number, since it is larger than the sum of its proper divisors (252525353539).

2777778888797 is a wasteful number, since it uses less digits than its factorization.

2777778888797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252525353538.

The product of its digits is 60718178304, while the sum is 92.

Adding to 2777778888797 its sum of digits (92), we get a square (2777778888889 = 1666667²).

The spelling of 2777778888797 in words is "two trillion, seven hundred seventy-seven billion, seven hundred seventy-eight million, eight hundred eighty-eight thousand, seven hundred ninety-seven".