1816798877 has 2 divisors, whose sum is σ = 1816798878. Its totient is φ = 1816798876.

The previous prime is 1816798871. The next prime is 1816798987. The reversal of 1816798877 is 7788976181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1785147001 + 31651876 = 42251^2 + 5626^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816798877 - 2⁴ = 1816798861 is a prime.

It is a super-2 number, since 2×1816798877² = 6601516318936922258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1816798871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908399438 + 908399439.

It is an arithmetic number, because the mean of its divisors is an integer number (908399439).

Almost surely, 2^1816798877 is an apocalyptic number.

It is an amenable number.

1816798877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816798877 is an equidigital number, since it uses as much as digits as its factorization.

1816798877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9483264, while the sum is 62.

The square root of 1816798877 is about 42623.9237635392. The cubic root of 1816798877 is about 1220.2129156748.

The spelling of 1816798877 in words is "one billion, eight hundred sixteen million, seven hundred ninety-eight thousand, eight hundred seventy-seven".