71961105319 has 4 divisors (see below), whose sum is σ = 72022981896. Its totient is φ = 71899228744.

The previous prime is 71961105313. The next prime is 71961105323. The reversal of 71961105319 is 91350116917.

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-71961105319 is a prime.

It is a super-2 number, since 2×71961105319² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71961105313) 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, 30936544 + ... + 30938869.

It is an arithmetic number, because the mean of its divisors is an integer number (18005745474).

Almost surely, 2^71961105319 is an apocalyptic number.

71961105319 is a deficient number, since it is larger than the sum of its proper divisors (61876577).

71961105319 is a wasteful number, since it uses less digits than its factorization.

71961105319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61876576.

The product of its (nonzero) digits is 51030, while the sum is 43.

The spelling of 71961105319 in words is "seventy-one billion, nine hundred sixty-one million, one hundred five thousand, three hundred nineteen".