73148317891 has 4 divisors (see below), whose sum is σ = 79798164984. Its totient is φ = 66498470800.

The previous prime is 73148317861. The next prime is 73148317897. The reversal of 73148317891 is 19871384137.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73148317891 - 2¹⁷ = 73148186819 is a prime.

It is a super-3 number, since 3×73148317891³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73148317897) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3324923530 + ... + 3324923551.

It is an arithmetic number, because the mean of its divisors is an integer number (19949541246).

Almost surely, 2^73148317891 is an apocalyptic number.

73148317891 is a deficient number, since it is larger than the sum of its proper divisors (6649847093).

73148317891 is a wasteful number, since it uses less digits than its factorization.

73148317891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6649847092.

The product of its digits is 1016064, while the sum is 52.

The spelling of 73148317891 in words is "seventy-three billion, one hundred forty-eight million, three hundred seventeen thousand, eight hundred ninety-one".