71839098965 has 4 divisors (see below), whose sum is σ = 86206918764. Its totient is φ = 57471279168.

The previous prime is 71839098923. The next prime is 71839098977. The reversal of 71839098965 is 56989093817.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46301141329 + 25537957636 = 215177^2 + 159806^2 .

It is a cyclic number.

It is not a de Polignac number, because 71839098965 - 2⁶ = 71839098901 is a prime.

It is a super-2 number, since 2×71839098965² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7183909892 + ... + 7183909901.

It is an arithmetic number, because the mean of its divisors is an integer number (21551729691).

Almost surely, 2^71839098965 is an apocalyptic number.

It is an amenable number.

71839098965 is a deficient number, since it is larger than the sum of its proper divisors (14367819799).

71839098965 is a wasteful number, since it uses less digits than its factorization.

71839098965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14367819798.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 71839098965 in words is "seventy-one billion, eight hundred thirty-nine million, ninety-eight thousand, nine hundred sixty-five".