1999477267201 has 2 divisors, whose sum is σ = 1999477267202. Its totient is φ = 1999477267200.

The previous prime is 1999477267187. The next prime is 1999477267219. The reversal of 1999477267201 is 1027627749991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1945400090176 + 54077177025 = 1394776^2 + 232545^2 .

It is an emirp because it is prime and its reverse (1027627749991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1999477267201 - 2³⁵ = 1965117528833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1999477267241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999738633600 + 999738633601.

It is an arithmetic number, because the mean of its divisors is an integer number (999738633601).

Almost surely, 2^{1999477267201} is an apocalyptic number.

It is an amenable number.

1999477267201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999477267201 is an equidigital number, since it uses as much as digits as its factorization.

1999477267201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24004512, while the sum is 64.

The spelling of 1999477267201 in words is "one trillion, nine hundred ninety-nine billion, four hundred seventy-seven million, two hundred sixty-seven thousand, two hundred one".