64740207168 has 672 divisors, whose sum is σ = 241563119616. Its totient is φ = 16110268416.

The previous prime is 64740207167. The next prime is 64740207193. The reversal of 64740207168 is 86170204746.

It is a tau number, because it is divible by the number of its divisors (672).

It is not an unprimeable number, because it can be changed into a prime (64740207167) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 100061821 + ... + 100062467.

It is an arithmetic number, because the mean of its divisors is an integer number (359468928).

Almost surely, 2^64740207168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64740207168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120781559808).

64740207168 is an abundant number, since it is smaller than the sum of its proper divisors (176822912448).

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

64740207168 is a wasteful number, since it uses less digits than its factorization.

64740207168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 64740207168 in words is "sixty-four billion, seven hundred forty million, two hundred seven thousand, one hundred sixty-eight".