71730153681 has 4 divisors (see below), whose sum is σ = 95640204912. Its totient is φ = 47820102452.

The previous prime is 71730153667. The next prime is 71730153689. The reversal of 71730153681 is 18635103717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71730153681 - 2¹⁰ = 71730152657 is a prime.

It is a super-2 number, since 2×71730153681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71730153689) 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, 11955025611 + ... + 11955025616.

It is an arithmetic number, because the mean of its divisors is an integer number (23910051228).

Almost surely, 2^71730153681 is an apocalyptic number.

It is an amenable number.

71730153681 is a deficient number, since it is larger than the sum of its proper divisors (23910051231).

71730153681 is a wasteful number, since it uses less digits than its factorization.

71730153681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23910051230.

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 71730153681 in words is "seventy-one billion, seven hundred thirty million, one hundred fifty-three thousand, six hundred eighty-one".