1366977547442 has 16 divisors (see below), whose sum is σ = 2208214339800. Its totient is φ = 630907045632.

The previous prime is 1366977547373. The next prime is 1366977547561. The reversal of 1366977547442 is 2447457796631.

It can be written as a sum of positive squares in 4 ways, for example, as 579518310121 + 787459237321 = 761261^2 + 887389^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4521434 + ... + 4814282.

Almost surely, 2^{1366977547442} is an apocalyptic number.

1366977547442 is a deficient number, since it is larger than the sum of its proper divisors (841236792358).

1366977547442 is a wasteful number, since it uses less digits than its factorization.

1366977547442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472397.

The product of its digits is 213373440, while the sum is 65.

The spelling of 1366977547442 in words is "one trillion, three hundred sixty-six billion, nine hundred seventy-seven million, five hundred forty-seven thousand, four hundred forty-two".