71049366431 has 4 divisors (see below), whose sum is σ = 71209749192. Its totient is φ = 70888983672.

The previous prime is 71049366407. The next prime is 71049366433. The reversal of 71049366431 is 13466394017.

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

It is a cyclic number.

It is not a de Polignac number, because 71049366431 - 2²² = 71045172127 is a prime.

It is a super-2 number, since 2×71049366431² (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 (71049366433) 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, 80190716 + ... + 80191601.

It is an arithmetic number, because the mean of its divisors is an integer number (17802437298).

Almost surely, 2^71049366431 is an apocalyptic number.

71049366431 is a deficient number, since it is larger than the sum of its proper divisors (160382761).

71049366431 is a wasteful number, since it uses less digits than its factorization.

71049366431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160382760.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 71049366431 in words is "seventy-one billion, forty-nine million, three hundred sixty-six thousand, four hundred thirty-one".