71141783765 has 16 divisors (see below), whose sum is σ = 92970082800. Its totient is φ = 51945180672.

The previous prime is 71141783761. The next prime is 71141783767. The reversal of 71141783765 is 56738714117.

It can be written as a sum of positive squares in 8 ways, for example, as 36182507089 + 34959276676 = 190217^2 + 186974^2 .

It is a cyclic number.

It is not a de Polignac number, because 71141783765 - 2² = 71141783761 is a prime.

It is a super-2 number, since 2×71141783765² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71141783761) 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, 6143030 + ... + 6154599.

It is an arithmetic number, because the mean of its divisors is an integer number (5810630175).

Almost surely, 2^71141783765 is an apocalyptic number.

It is an amenable number.

71141783765 is a deficient number, since it is larger than the sum of its proper divisors (21828299035).

71141783765 is a wasteful number, since it uses less digits than its factorization.

71141783765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12297736.

The product of its digits is 987840, while the sum is 50.

The spelling of 71141783765 in words is "seventy-one billion, one hundred forty-one million, seven hundred eighty-three thousand, seven hundred sixty-five".