64243445760 has 728 divisors, whose sum is σ = 249674654544. Its totient is φ = 15765995520.

The previous prime is 64243445743. The next prime is 64243445767. The reversal of 64243445760 is 6754434246.

64243445760 is a `hidden beast` number, since 6 + 42 + 4 + 34 + 4 + 576 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64243445767) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 194088795 + ... + 194089125.

Almost surely, 2^64243445760 is an apocalyptic number.

64243445760 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 64243445760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124837327272).

64243445760 is an abundant number, since it is smaller than the sum of its proper divisors (185431208784).

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

64243445760 is an equidigital number, since it uses as much as digits as its factorization.

64243445760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 45.

The spelling of 64243445760 in words is "sixty-four billion, two hundred forty-three million, four hundred forty-five thousand, seven hundred sixty".