1445728571885 has 64 divisors (see below), whose sum is σ = 2043556010496. Its totient is φ = 973118361600.

The previous prime is 1445728571863. The next prime is 1445728571891. The reversal of 1445728571885 is 5881758275441.

It is not a de Polignac number, because 1445728571885 - 2⁸ = 1445728571629 is a prime.

It is a super-2 number, since 2×1445728571885² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2361425 + ... + 2909945.

It is an arithmetic number, because the mean of its divisors is an integer number (31930562664).

Almost surely, 2^{1445728571885} is an apocalyptic number.

It is an amenable number.

1445728571885 is a deficient number, since it is larger than the sum of its proper divisors (597827438611).

1445728571885 is a wasteful number, since it uses less digits than its factorization.

1445728571885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548646.

The product of its digits is 100352000, while the sum is 65.

The spelling of 1445728571885 in words is "one trillion, four hundred forty-five billion, seven hundred twenty-eight million, five hundred seventy-one thousand, eight hundred eighty-five".