1445645653 has 4 divisors (see below), whose sum is σ = 1456681248. Its totient is φ = 1434610060.

The previous prime is 1445645651. The next prime is 1445645683. The reversal of 1445645653 is 3565465441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1445645653 - 2¹ = 1445645651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445645651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5517601 + ... + 5517862.

It is an arithmetic number, because the mean of its divisors is an integer number (364170312).

Almost surely, 2^1445645653 is an apocalyptic number.

It is an amenable number.

1445645653 is a deficient number, since it is larger than the sum of its proper divisors (11035595).

1445645653 is a wasteful number, since it uses less digits than its factorization.

1445645653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11035594.

The product of its digits is 864000, while the sum is 43.

The square root of 1445645653 is about 38021.6471631622. The cubic root of 1445645653 is about 1130.7170776860.

The spelling of 1445645653 in words is "one billion, four hundred forty-five million, six hundred forty-five thousand, six hundred fifty-three".