1445455664 has 20 divisors (see below), whose sum is σ = 2865701256. Its totient is φ = 705919872.

The previous prime is 1445455657. The next prime is 1445455667. The reversal of 1445455664 is 4665545441.

It is not an unprimeable number, because it can be changed into a prime (1445455667) 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, 1049789 + ... + 1051164.

Almost surely, 2^1445455664 is an apocalyptic number.

It is an amenable number.

1445455664 is a deficient number, since it is larger than the sum of its proper divisors (1420245592).

1445455664 is a wasteful number, since it uses less digits than its factorization.

1445455664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101004 (or 2100998 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 44.

The square root of 1445455664 is about 38019.1486490689. The cubic root of 1445455664 is about 1130.6675419837.

The spelling of 1445455664 in words is "one billion, four hundred forty-five million, four hundred fifty-five thousand, six hundred sixty-four".