64430544064 has 28 divisors (see below), whose sum is σ = 128114819208. Its totient is φ = 32149644800.

The previous prime is 64430544049. The next prime is 64430544077. The reversal of 64430544064 is 46044503446.

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, 993757 + ... + 1056604.

Almost surely, 2^64430544064 is an apocalyptic number.

64430544064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64430544064 is a deficient number, since it is larger than the sum of its proper divisors (63684275144).

64430544064 is a wasteful number, since it uses less digits than its factorization.

64430544064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050864 (or 2050854 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 40.

The spelling of 64430544064 in words is "sixty-four billion, four hundred thirty million, five hundred forty-four thousand, sixty-four".