1277104450543 has 4 divisors (see below), whose sum is σ = 1306804554088. Its totient is φ = 1247404347000.

The previous prime is 1277104450507. The next prime is 1277104450571. The reversal of 1277104450543 is 3450544017721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277104450543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 29700103501 = 1277104450543 / (1 + 2 + 7 + 7 + 1 + 0 + 4 + 4 + 5 + 0 + 5 + 4 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1277104450543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277104453543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14850051708 + ... + 14850051793.

It is an arithmetic number, because the mean of its divisors is an integer number (326701138522).

Almost surely, 2^{1277104450543} is an apocalyptic number.

1277104450543 is a deficient number, since it is larger than the sum of its proper divisors (29700103545).

1277104450543 is an equidigital number, since it uses as much as digits as its factorization.

1277104450543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29700103544.

The product of its (nonzero) digits is 470400, while the sum is 43.

The spelling of 1277104450543 in words is "one trillion, two hundred seventy-seven billion, one hundred four million, four hundred fifty thousand, five hundred forty-three".