71732521099 has 4 divisors (see below), whose sum is σ = 71734794120. Its totient is φ = 71730248080.

The previous prime is 71732521073. The next prime is 71732521111. The reversal of 71732521099 is 99012523717.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71732521099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71732525099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088497 + ... + 1152514.

It is an arithmetic number, because the mean of its divisors is an integer number (17933698530).

Almost surely, 2^71732521099 is an apocalyptic number.

71732521099 is a deficient number, since it is larger than the sum of its proper divisors (2273021).

71732521099 is a wasteful number, since it uses less digits than its factorization.

71732521099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273020.

The product of its (nonzero) digits is 238140, while the sum is 46.

The spelling of 71732521099 in words is "seventy-one billion, seven hundred thirty-two million, five hundred twenty-one thousand, ninety-nine".