71520913193 has 4 divisors (see below), whose sum is σ = 73184190288. Its totient is φ = 69857636100.

The previous prime is 71520913181. The next prime is 71520913241. The reversal of 71520913193 is 39131902517.

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 71520913193 - 2¹⁸ = 71520651049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71520913193.

It is not an unprimeable number, because it can be changed into a prime (71520913103) 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, 831638483 + ... + 831638568.

It is an arithmetic number, because the mean of its divisors is an integer number (18296047572).

Almost surely, 2^71520913193 is an apocalyptic number.

It is an amenable number.

71520913193 is a deficient number, since it is larger than the sum of its proper divisors (1663277095).

71520913193 is a wasteful number, since it uses less digits than its factorization.

71520913193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663277094.

The product of its (nonzero) digits is 51030, while the sum is 41.

The spelling of 71520913193 in words is "seventy-one billion, five hundred twenty million, nine hundred thirteen thousand, one hundred ninety-three".