1445112111778 has 4 divisors (see below), whose sum is σ = 2167668167670. Its totient is φ = 722556055888.

The previous prime is 1445112111769. The next prime is 1445112111791. The reversal of 1445112111778 is 8771112115441.

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., 1287378429129 + 157733682649 = 1134627^2 + 397157^2 .

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 as a sum of consecutive naturals, namely, 361278027943 + ... + 361278027946.

Almost surely, 2^{1445112111778} is an apocalyptic number.

1445112111778 is a deficient number, since it is larger than the sum of its proper divisors (722556055892).

1445112111778 is an equidigital number, since it uses as much as digits as its factorization.

1445112111778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722556055891.

The product of its digits is 62720, while the sum is 43.

The spelling of 1445112111778 in words is "one trillion, four hundred forty-five billion, one hundred twelve million, one hundred eleven thousand, seven hundred seventy-eight".