64073324544 has 96 divisors (see below), whose sum is σ = 171171000000. Its totient is φ = 21313953792.

The previous prime is 64073324543. The next prime is 64073324563. The reversal of 64073324544 is 44542337046.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 64073324496 and 64073324505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64073324543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3055407 + ... + 3076305.

It is an arithmetic number, because the mean of its divisors is an integer number (1783031250).

Almost surely, 2^64073324544 is an apocalyptic number.

64073324544 is a gapful number since it is divisible by the number (64) 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 64073324544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85585500000).

64073324544 is an abundant number, since it is smaller than the sum of its proper divisors (107097675456).

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

64073324544 is a wasteful number, since it uses less digits than its factorization.

64073324544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21423 (or 21403 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 42.

The spelling of 64073324544 in words is "sixty-four billion, seventy-three million, three hundred twenty-four thousand, five hundred forty-four".