64720377604 has 27 divisors (see below), whose sum is σ = 114249507463. Its totient is φ = 32080092200.

The previous prime is 64720377599. The next prime is 64720377647. The reversal of 64720377604 is 40677302746.

The square root of 64720377604 is 254402.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 66652839 + ... + 66653809.

Almost surely, 2^64720377604 is an apocalyptic number.

64720377604 is the 254402-nd square number.

It is an amenable number.

64720377604 is a deficient number, since it is larger than the sum of its proper divisors (49529129859).

64720377604 is an frugal number, since it uses more digits than its factorization.

64720377604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 46.

The spelling of 64720377604 in words is "sixty-four billion, seven hundred twenty million, three hundred seventy-seven thousand, six hundred four".