1977543443299 has 2 divisors, whose sum is σ = 1977543443300. Its totient is φ = 1977543443298.

The previous prime is 1977543443203. The next prime is 1977543443311. The reversal of 1977543443299 is 9923443457791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1977543443299 - 2⁷ = 1977543443171 is a prime.

It is a super-5 number, since 5×1977543443299⁵ (a number of 63 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (1977543443899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988771721649 + 988771721650.

It is an arithmetic number, because the mean of its divisors is an integer number (988771721650).

Almost surely, 2^{1977543443299} is an apocalyptic number.

1977543443299 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977543443299 is an equidigital number, since it uses as much as digits as its factorization.

1977543443299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 205752960, while the sum is 67.

The spelling of 1977543443299 in words is "one trillion, nine hundred seventy-seven billion, five hundred forty-three million, four hundred forty-three thousand, two hundred ninety-nine".