1445662386505 has 4 divisors (see below), whose sum is σ = 1734794863812. Its totient is φ = 1156529909200.

The previous prime is 1445662386503. The next prime is 1445662386527. The reversal of 1445662386505 is 5056832665441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 352912036096 + 1092750350409 = 594064^2 + 1045347^2 .

It is not a de Polignac number, because 1445662386505 - 2¹ = 1445662386503 is a prime.

It is a super-2 number, since 2×1445662386505² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445662386503) 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, 144566238646 + ... + 144566238655.

It is an arithmetic number, because the mean of its divisors is an integer number (433698715953).

Almost surely, 2^{1445662386505} is an apocalyptic number.

It is an amenable number.

1445662386505 is a deficient number, since it is larger than the sum of its proper divisors (289132477307).

1445662386505 is an equidigital number, since it uses as much as digits as its factorization.

1445662386505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289132477306.

The product of its (nonzero) digits is 20736000, while the sum is 55.

The spelling of 1445662386505 in words is "one trillion, four hundred forty-five billion, six hundred sixty-two million, three hundred eighty-six thousand, five hundred five".