2790078881 has 2 divisors, whose sum is σ = 2790078882. Its totient is φ = 2790078880.

The previous prime is 2790078877. The next prime is 2790078911. The reversal of 2790078881 is 1888700972.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1721835025 + 1068243856 = 41495^2 + 32684^2 .

It is a cyclic number.

It is not a de Polignac number, because 2790078881 - 2² = 2790078877 is a prime.

It is a super-2 number, since 2×2790078881² = 15569080324404424322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2790078481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1395039440 + 1395039441.

It is an arithmetic number, because the mean of its divisors is an integer number (1395039441).

Almost surely, 2^2790078881 is an apocalyptic number.

It is an amenable number.

2790078881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2790078881 is an equidigital number, since it uses as much as digits as its factorization.

2790078881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 50.

The square root of 2790078881 is about 52821.1972696568. The cubic root of 2790078881 is about 1407.7930837855.

The spelling of 2790078881 in words is "two billion, seven hundred ninety million, seventy-eight thousand, eight hundred eighty-one".