71321263919 has 16 divisors (see below), whose sum is σ = 72090672192. Its totient is φ = 70557497088.

The previous prime is 71321263877. The next prime is 71321263957. The reversal of 71321263919 is 91936212317.

It is a cyclic number.

It is not a de Polignac number, because 71321263919 - 2¹⁶ = 71321198383 is a prime.

It is a super-2 number, since 2×71321263919² (a number of 23 digits) contains 22 as substring.

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 71321263919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71321263619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24117989 + ... + 24120945.

It is an arithmetic number, because the mean of its divisors is an integer number (4505667012).

Almost surely, 2^71321263919 is an apocalyptic number.

71321263919 is a deficient number, since it is larger than the sum of its proper divisors (769408273).

71321263919 is a wasteful number, since it uses less digits than its factorization.

71321263919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826.

The product of its digits is 122472, while the sum is 44.

The spelling of 71321263919 in words is "seventy-one billion, three hundred twenty-one million, two hundred sixty-three thousand, nine hundred nineteen".