2758794781 has 2 divisors, whose sum is σ = 2758794782. Its totient is φ = 2758794780.

The previous prime is 2758794713. The next prime is 2758794809. The reversal of 2758794781 is 1874978572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2281590756 + 477204025 = 47766^2 + 21845^2 .

It is a cyclic number.

It is not a de Polignac number, because 2758794781 - 2²³ = 2750406173 is a prime.

It is a super-2 number, since 2×2758794781² = 15221897287345675922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2758794581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1379397390 + 1379397391.

It is an arithmetic number, because the mean of its divisors is an integer number (1379397391).

Almost surely, 2^2758794781 is an apocalyptic number.

It is an amenable number.

2758794781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2758794781 is an equidigital number, since it uses as much as digits as its factorization.

2758794781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7902720, while the sum is 58.

The square root of 2758794781 is about 52524.2304179700. The cubic root of 2758794781 is about 1402.5116106745.

The spelling of 2758794781 in words is "two billion, seven hundred fifty-eight million, seven hundred ninety-four thousand, seven hundred eighty-one".