64747229312 has 16 divisors (see below), whose sum is σ = 128988621150. Its totient is φ = 32373614592.

The previous prime is 64747229257. The next prime is 64747229341. The reversal of 64747229312 is 21392274746.

It can be written as a sum of positive squares in only one way, i.e., 38846833216 + 25900396096 = 197096^2 + 160936^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252918737 + ... + 252918992.

Almost surely, 2^64747229312 is an apocalyptic number.

It is an amenable number.

64747229312 is a deficient number, since it is larger than the sum of its proper divisors (64241391838).

64747229312 is an equidigital number, since it uses as much as digits as its factorization.

64747229312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505837743 (or 505837731 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 47.

The spelling of 64747229312 in words is "sixty-four billion, seven hundred forty-seven million, two hundred twenty-nine thousand, three hundred twelve".