64720330547 has 16 divisors (see below), whose sum is σ = 65579387328. Its totient is φ = 63868746240.

The previous prime is 64720330529. The next prime is 64720330559. The reversal of 64720330547 is 74503302746.

It is a cyclic number.

It is not a de Polignac number, because 64720330547 - 2¹⁴ = 64720314163 is a prime.

It is a super-2 number, since 2×64720330547² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64720330567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13197698 + ... + 13202600.

It is an arithmetic number, because the mean of its divisors is an integer number (4098711708).

Almost surely, 2^64720330547 is an apocalyptic number.

64720330547 is a deficient number, since it is larger than the sum of its proper divisors (859056781).

64720330547 is a wasteful number, since it uses less digits than its factorization.

64720330547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5630.

The product of its (nonzero) digits is 423360, while the sum is 41.

The spelling of 64720330547 in words is "sixty-four billion, seven hundred twenty million, three hundred thirty thousand, five hundred forty-seven".