71520913195 has 4 divisors (see below), whose sum is σ = 85825095840. Its totient is φ = 57216730552.

The previous prime is 71520913181. The next prime is 71520913241. The reversal of 71520913195 is 59131902517.

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-71520913195 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 7152091315 + ... + 7152091324.

It is an arithmetic number, because the mean of its divisors is an integer number (21456273960).

Almost surely, 2^71520913195 is an apocalyptic number.

71520913195 is a deficient number, since it is larger than the sum of its proper divisors (14304182645).

71520913195 is a wasteful number, since it uses less digits than its factorization.

71520913195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14304182644.

The product of its (nonzero) digits is 85050, while the sum is 43.

The spelling of 71520913195 in words is "seventy-one billion, five hundred twenty million, nine hundred thirteen thousand, one hundred ninety-five".