64496343040 has 96 divisors (see below), whose sum is σ = 154879452000. Its totient is φ = 25777537024.

The previous prime is 64496343013. The next prime is 64496343053. The reversal of 64496343040 is 4034369446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20877816 + ... + 20880904.

It is an arithmetic number, because the mean of its divisors is an integer number (1613327625).

Almost surely, 2^64496343040 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 64496343040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77439726000).

64496343040 is an abundant number, since it is smaller than the sum of its proper divisors (90383108960).

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

64496343040 is a wasteful number, since it uses less digits than its factorization.

64496343040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155 (or 5135 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 64496343040 in words is "sixty-four billion, four hundred ninety-six million, three hundred forty-three thousand, forty".