73491313520 has 40 divisors (see below), whose sum is σ = 172212739584. Its totient is φ = 29165052672.

The previous prime is 73491313499. The next prime is 73491313601. The reversal of 73491313520 is 2531319437.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3606539 + ... + 3626858.

Almost surely, 2^73491313520 is an apocalyptic number.

It is an amenable number.

73491313520 is an abundant number, since it is smaller than the sum of its proper divisors (98721426064).

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

73491313520 is a wasteful number, since it uses less digits than its factorization.

73491313520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7233537 (or 7233531 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 73491313520 in words is "seventy-three billion, four hundred ninety-one million, three hundred thirteen thousand, five hundred twenty".