1445405621403 has 16 divisors (see below), whose sum is σ = 1930682182176. Its totient is φ = 961866639360.

The previous prime is 1445405621389. The next prime is 1445405621449. The reversal of 1445405621403 is 3041265045441.

It is not a de Polignac number, because 1445405621403 - 2⁶ = 1445405621339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1445405620403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44195125 + ... + 44227817.

It is an arithmetic number, because the mean of its divisors is an integer number (120667636386).

Almost surely, 2^{1445405621403} is an apocalyptic number.

1445405621403 is a deficient number, since it is larger than the sum of its proper divisors (485276560773).

1445405621403 is a wasteful number, since it uses less digits than its factorization.

1445405621403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58814.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 1445405621403 in words is "one trillion, four hundred forty-five billion, four hundred five million, six hundred twenty-one thousand, four hundred three".