64744753240 has 64 divisors (see below), whose sum is σ = 146150645760. Its totient is φ = 25813603200.

The previous prime is 64744753169. The next prime is 64744753253. The reversal of 64744753240 is 4235744746.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27538065 + ... + 27540415.

It is an arithmetic number, because the mean of its divisors is an integer number (2283603840).

Almost surely, 2^64744753240 is an apocalyptic number.

It is an amenable number.

64744753240 is an abundant number, since it is smaller than the sum of its proper divisors (81405892520).

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

64744753240 is a wasteful number, since it uses less digits than its factorization.

64744753240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4312 (or 4308 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 46.

The spelling of 64744753240 in words is "sixty-four billion, seven hundred forty-four million, seven hundred fifty-three thousand, two hundred forty".