64923545 has 4 divisors (see below), whose sum is σ = 77908260. Its totient is φ = 51938832.

The previous prime is 64923539. The next prime is 64923557. The reversal of 64923545 is 54532946.

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 37002889 + 27920656 = 6083^2 + 5284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64923545 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64923499 and 64923508.

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 3 ways as a sum of consecutive naturals, for example, 6492350 + ... + 6492359.

It is an arithmetic number, because the mean of its divisors is an integer number (19477065).

Almost surely, 2^64923545 is an apocalyptic number.

It is an amenable number.

64923545 is a deficient number, since it is larger than the sum of its proper divisors (12984715).

64923545 is a wasteful number, since it uses less digits than its factorization.

64923545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12984714.

The product of its digits is 129600, while the sum is 38.

The square root of 64923545 is about 8057.5148153758. The cubic root of 64923545 is about 401.9148706318.

The spelling of 64923545 in words is "sixty-four million, nine hundred twenty-three thousand, five hundred forty-five".