64472456731 has 4 divisors (see below), whose sum is σ = 64473043600. Its totient is φ = 64471869864.

The previous prime is 64472456707. The next prime is 64472456749. The reversal of 64472456731 is 13765427446.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64472456731 - 2⁹ = 64472456219 is a prime.

It is a super-3 number, since 3×64472456731³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64472456771) 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, 73896 + ... + 366613.

It is an arithmetic number, because the mean of its divisors is an integer number (16118260900).

Almost surely, 2^64472456731 is an apocalyptic number.

64472456731 is a deficient number, since it is larger than the sum of its proper divisors (586869).

64472456731 is a wasteful number, since it uses less digits than its factorization.

64472456731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586868.

The product of its digits is 3386880, while the sum is 49.

The spelling of 64472456731 in words is "sixty-four billion, four hundred seventy-two million, four hundred fifty-six thousand, seven hundred thirty-one".