64740945724 has 192 divisors, whose sum is σ = 153811517440. Its totient is φ = 23125512960.

The previous prime is 64740945707. The next prime is 64740945733. The reversal of 64740945724 is 42754904746.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14362279 + ... + 14366785.

Almost surely, 2^64740945724 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 64740945724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76905758720).

64740945724 is an abundant number, since it is smaller than the sum of its proper divisors (89070571716).

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

64740945724 is a wasteful number, since it uses less digits than its factorization.

64740945724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648 (or 4646 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 52.

The spelling of 64740945724 in words is "sixty-four billion, seven hundred forty million, nine hundred forty-five thousand, seven hundred twenty-four".