73397321555 has 8 divisors (see below), whose sum is σ = 88358183232. Its totient is φ = 58530259008.

The previous prime is 73397321513. The next prime is 73397321573. The reversal of 73397321555 is 55512379337.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73397321555 - 2²² = 73393127251 is a prime.

It is a super-2 number, since 2×73397321555² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23448059 + ... + 23451188.

It is an arithmetic number, because the mean of its divisors is an integer number (11044772904).

Almost surely, 2^73397321555 is an apocalyptic number.

73397321555 is a deficient number, since it is larger than the sum of its proper divisors (14960861677).

73397321555 is a wasteful number, since it uses less digits than its factorization.

73397321555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46899565.

The product of its digits is 2976750, while the sum is 50.

The spelling of 73397321555 in words is "seventy-three billion, three hundred ninety-seven million, three hundred twenty-one thousand, five hundred fifty-five".