64744406712 has 24 divisors (see below), whose sum is σ = 175349435040. Its totient is φ = 21581468880.

The previous prime is 64744406689. The next prime is 64744406717. The reversal of 64744406712 is 21760444746.

It is a happy number.

64744406712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64744406717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 449613864 + ... + 449614007.

It is an arithmetic number, because the mean of its divisors is an integer number (7306226460).

Almost surely, 2^64744406712 is an apocalyptic number.

It is an amenable number.

64744406712 is an abundant number, since it is smaller than the sum of its proper divisors (110605028328).

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

64744406712 is a wasteful number, since it uses less digits than its factorization.

64744406712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899227883 (or 899227876 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 45.

The spelling of 64744406712 in words is "sixty-four billion, seven hundred forty-four million, four hundred six thousand, seven hundred twelve".