71380187243 has 16 divisors (see below), whose sum is σ = 75716501280. Its totient is φ = 67190086656.

The previous prime is 71380187237. The next prime is 71380187251. The reversal of 71380187243 is 34278108317.

It is a cyclic number.

It is not a de Polignac number, because 71380187243 - 2²⁶ = 71313078379 is a prime.

It is a super-2 number, since 2×71380187243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71380187194 and 71380187203.

It is not an unprimeable number, because it can be changed into a prime (71380187233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 896 + ... + 377837.

It is an arithmetic number, because the mean of its divisors is an integer number (4732281330).

Almost surely, 2^71380187243 is an apocalyptic number.

71380187243 is a deficient number, since it is larger than the sum of its proper divisors (4336314037).

71380187243 is a wasteful number, since it uses less digits than its factorization.

71380187243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378926.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 71380187243 in words is "seventy-one billion, three hundred eighty million, one hundred eighty-seven thousand, two hundred forty-three".