73641067544 has 80 divisors (see below), whose sum is σ = 152279217000. Its totient is φ = 33386165120.

The previous prime is 73641067543. The next prime is 73641067571. The reversal of 73641067544 is 44576014637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73641067541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 72267467 + ... + 72268485.

Almost surely, 2^73641067544 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 73641067544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76139608500).

73641067544 is an abundant number, since it is smaller than the sum of its proper divisors (78638149456).

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

73641067544 is a wasteful number, since it uses less digits than its factorization.

73641067544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 73641067544 in words is "seventy-three billion, six hundred forty-one million, sixty-seven thousand, five hundred forty-four".