64472456687 has 4 divisors (see below), whose sum is σ = 64742216160. Its totient is φ = 64202697216.

The previous prime is 64472456683. The next prime is 64472456707. The reversal of 64472456687 is 78665427446.

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

It is a cyclic number.

It is not a de Polignac number, because 64472456687 - 2² = 64472456683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64472456683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134879378 + ... + 134879855.

It is an arithmetic number, because the mean of its divisors is an integer number (16185554040).

Almost surely, 2^64472456687 is an apocalyptic number.

64472456687 is a deficient number, since it is larger than the sum of its proper divisors (269759473).

64472456687 is a wasteful number, since it uses less digits than its factorization.

64472456687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269759472.

The product of its digits is 54190080, while the sum is 59.

The spelling of 64472456687 in words is "sixty-four billion, four hundred seventy-two million, four hundred fifty-six thousand, six hundred eighty-seven".