1445673553 has 2 divisors, whose sum is σ = 1445673554. Its totient is φ = 1445673552.

The previous prime is 1445673511. The next prime is 1445673589. The reversal of 1445673553 is 3553765441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1268570689 + 177102864 = 35617^2 + 13308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1445673553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1445677553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722836776 + 722836777.

It is an arithmetic number, because the mean of its divisors is an integer number (722836777).

Almost surely, 2^1445673553 is an apocalyptic number.

It is an amenable number.

1445673553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445673553 is an equidigital number, since it uses as much as digits as its factorization.

1445673553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 43.

The square root of 1445673553 is about 38022.0140576482. The cubic root of 1445673553 is about 1130.7243516685.

The spelling of 1445673553 in words is "one billion, four hundred forty-five million, six hundred seventy-three thousand, five hundred fifty-three".