1445666453 has 24 divisors (see below), whose sum is σ = 1842148800. Its totient is φ = 1124673480.

The previous prime is 1445666447. The next prime is 1445666461. The reversal of 1445666453 is 3546665441.

It is not a de Polignac number, because 1445666453 - 2⁸ = 1445666197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445666413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2335178 + ... + 2335796.

It is an arithmetic number, because the mean of its divisors is an integer number (76756200).

Almost surely, 2^1445666453 is an apocalyptic number.

It is an amenable number.

1445666453 is a deficient number, since it is larger than the sum of its proper divisors (396482347).

1445666453 is an frugal number, since it uses more digits than its factorization.

1445666453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 637 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

The square root of 1445666453 is about 38021.9206905701. The cubic root of 1445666453 is about 1130.7225005923.

The spelling of 1445666453 in words is "one billion, four hundred forty-five million, six hundred sixty-six thousand, four hundred fifty-three".