64067923571 has 4 divisors (see below), whose sum is σ = 64071249000. Its totient is φ = 64064598144.

The previous prime is 64067923499. The next prime is 64067923607. The reversal of 64067923571 is 17532976046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64067923571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64067923471) 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, 1633646 + ... + 1672403.

It is an arithmetic number, because the mean of its divisors is an integer number (16017812250).

Almost surely, 2^64067923571 is an apocalyptic number.

64067923571 is a deficient number, since it is larger than the sum of its proper divisors (3325429).

64067923571 is a wasteful number, since it uses less digits than its factorization.

64067923571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325428.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 64067923571 in words is "sixty-four billion, sixty-seven million, nine hundred twenty-three thousand, five hundred seventy-one".