64443143406512 has 20 divisors (see below), whose sum is σ = 134463097300560. Its totient is φ = 29742989264448.

The previous prime is 64443143406491. The next prime is 64443143406569. The reversal of 64443143406512 is 21560434134446.

It is a super-2 number, since 2×64443143406512² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154911402212 + ... + 154911402627.

It is an arithmetic number, because the mean of its divisors is an integer number (6723154865028).

Almost surely, 2^{64443143406512} is an apocalyptic number.

It is an amenable number.

64443143406512 is an abundant number, since it is smaller than the sum of its proper divisors (70019953894048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64443143406512 is a wasteful number, since it uses less digits than its factorization.

64443143406512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309822804860 (or 309822804854 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 64443143406512 in words is "sixty-four trillion, four hundred forty-three billion, one hundred forty-three million, four hundred six thousand, five hundred twelve".