2775728604991 has 2 divisors, whose sum is σ = 2775728604992. Its totient is φ = 2775728604990.

The previous prime is 2775728604973. The next prime is 2775728605049. The reversal of 2775728604991 is 1994068275772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2775728604991 - 2¹⁷ = 2775728473919 is a prime.

It is a super-2 number, since 2×2775728604991² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2775728604391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387864302495 + 1387864302496.

It is an arithmetic number, because the mean of its divisors is an integer number (1387864302496).

Almost surely, 2^{2775728604991} is an apocalyptic number.

2775728604991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2775728604991 is an equidigital number, since it uses as much as digits as its factorization.

2775728604991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 106686720, while the sum is 67.

The spelling of 2775728604991 in words is "two trillion, seven hundred seventy-five billion, seven hundred twenty-eight million, six hundred four thousand, nine hundred ninety-one".