2773993078081 has 2 divisors, whose sum is σ = 2773993078082. Its totient is φ = 2773993078080.

The previous prime is 2773993078069. The next prime is 2773993078099. The reversal of 2773993078081 is 1808703993772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2762107717681 + 11885360400 = 1661959^2 + 109020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2773993078081 - 2¹¹ = 2773993076033 is a prime.

It is a super-2 number, since 2×2773993078081² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2773993078061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1386996539040 + 1386996539041.

It is an arithmetic number, because the mean of its divisors is an integer number (1386996539041).

Almost surely, 2^{2773993078081} is an apocalyptic number.

It is an amenable number.

2773993078081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2773993078081 is an equidigital number, since it uses as much as digits as its factorization.

2773993078081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32006016, while the sum is 64.

The spelling of 2773993078081 in words is "two trillion, seven hundred seventy-three billion, nine hundred ninety-three million, seventy-eight thousand, eighty-one".