64472743672 has 8 divisors (see below), whose sum is σ = 120886394400. Its totient is φ = 32236371832.

The previous prime is 64472743667. The next prime is 64472743679. The reversal of 64472743672 is 27634727446.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64472743679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4029546472 + ... + 4029546487.

It is an arithmetic number, because the mean of its divisors is an integer number (15110799300).

Almost surely, 2^64472743672 is an apocalyptic number.

It is an amenable number.

64472743672 is a deficient number, since it is larger than the sum of its proper divisors (56413650728).

64472743672 is a wasteful number, since it uses less digits than its factorization.

64472743672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8059092965 (or 8059092961 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 52.

The spelling of 64472743672 in words is "sixty-four billion, four hundred seventy-two million, seven hundred forty-three thousand, six hundred seventy-two".