1100446477978 has 4 divisors (see below), whose sum is σ = 1650669716970. Its totient is φ = 550223238988.

The previous prime is 1100446477913. The next prime is 1100446477979. The reversal of 1100446477978 is 8797746440011.

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

It can be written as a sum of positive squares in only one way, i.e., 1071467203689 + 28979274289 = 1035117^2 + 170233^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1100446477979) by changing a digit.

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 as a sum of consecutive naturals, namely, 275111619493 + ... + 275111619496.

Almost surely, 2^{1100446477978} is an apocalyptic number.

1100446477978 is a deficient number, since it is larger than the sum of its proper divisors (550223238992).

1100446477978 is an equidigital number, since it uses as much as digits as its factorization.

1100446477978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550223238991.

The product of its (nonzero) digits is 9483264, while the sum is 58.

The spelling of 1100446477978 in words is "one trillion, one hundred billion, four hundred forty-six million, four hundred seventy-seven thousand, nine hundred seventy-eight".