423765766545 has 16 divisors (see below), whose sum is σ = 739663883712. Its totient is φ = 205462189760.

The previous prime is 423765766499. The next prime is 423765766583. The reversal of 423765766545 is 545667567324.

It is a happy number.

It is not a de Polignac number, because 423765766545 - 2⁹ = 423765766033 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1284138522 + ... + 1284138851.

It is an arithmetic number, because the mean of its divisors is an integer number (46228992732).

Almost surely, 2^423765766545 is an apocalyptic number.

It is an amenable number.

423765766545 is a deficient number, since it is larger than the sum of its proper divisors (315898117167).

423765766545 is a wasteful number, since it uses less digits than its factorization.

423765766545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568277392.

The product of its digits is 127008000, while the sum is 60.

The spelling of 423765766545 in words is "four hundred twenty-three billion, seven hundred sixty-five million, seven hundred sixty-six thousand, five hundred forty-five".