64496369794560 has 640 divisors, whose sum is σ = 229853784416256. Its totient is φ = 15296961085440.

The previous prime is 64496369794529. The next prime is 64496369794579. The reversal of 64496369794560 is 6549796369446.

It is a tau number, because it is divible by the number of its divisors (640).

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, 722174869 + ... + 722264171.

Almost surely, 2^{64496369794560} is an apocalyptic number.

64496369794560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64496369794560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114926892208128).

64496369794560 is an abundant number, since it is smaller than the sum of its proper divisors (165357414621696).

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

64496369794560 is a wasteful number, since it uses less digits than its factorization.

64496369794560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89526 (or 89510 counting only the distinct ones).

The product of its (nonzero) digits is 6348948480, while the sum is 78.

The spelling of 64496369794560 in words is "sixty-four trillion, four hundred ninety-six billion, three hundred sixty-nine million, seven hundred ninety-four thousand, five hundred sixty".