1445621216765 has 16 divisors (see below), whose sum is σ = 1893548062656. Its totient is φ = 1050750624000.

The previous prime is 1445621216729. The next prime is 1445621216777. The reversal of 1445621216765 is 5676121265441.

It is not a de Polignac number, because 1445621216765 - 2⁸ = 1445621216509 is a prime.

It is a super-2 number, since 2×1445621216765² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7532636 + ... + 7722165.

It is an arithmetic number, because the mean of its divisors is an integer number (118346753916).

Almost surely, 2^{1445621216765} is an apocalyptic number.

It is an amenable number.

1445621216765 is a deficient number, since it is larger than the sum of its proper divisors (447926845891).

1445621216765 is a wasteful number, since it uses less digits than its factorization.

1445621216765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15256540.

The product of its digits is 2419200, while the sum is 50.

The spelling of 1445621216765 in words is "one trillion, four hundred forty-five billion, six hundred twenty-one million, two hundred sixteen thousand, seven hundred sixty-five".