1799999999977 has 2 divisors, whose sum is σ = 1799999999978. Its totient is φ = 1799999999976.

The previous prime is 1799999999969. The next prime is 1800000000047. The reversal of 1799999999977 is 7799999999971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1721543429776 + 78456570201 = 1312076^2 + 280101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1799999999977 - 2³ = 1799999999969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1799999999377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899999999988 + 899999999989.

It is an arithmetic number, because the mean of its divisors is an integer number (899999999989).

Almost surely, 2^{1799999999977} is an apocalyptic number.

It is an amenable number.

1799999999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1799999999977 is an equidigital number, since it uses as much as digits as its factorization.

1799999999977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132885227727, while the sum is 103.

The spelling of 1799999999977 in words is "one trillion, seven hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-seven".