64348939240 has 128 divisors (see below), whose sum is σ = 157779511200. Its totient is φ = 23520706560.

The previous prime is 64348939201. The next prime is 64348939253. The reversal of 64348939240 is 4293984346.

It can be written as a sum of positive squares in 16 ways, for example, as 41765461956 + 22583477284 = 204366^2 + 150278^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13105906 + ... + 13110814.

Almost surely, 2^64348939240 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 64348939240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78889755600).

64348939240 is an abundant number, since it is smaller than the sum of its proper divisors (93430571960).

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

64348939240 is a wasteful number, since it uses less digits than its factorization.

64348939240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495 (or 5491 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 52.

The spelling of 64348939240 in words is "sixty-four billion, three hundred forty-eight million, nine hundred thirty-nine thousand, two hundred forty".