71484875765 has 16 divisors (see below), whose sum is σ = 86374260336. Its totient is φ = 56793830400.

The previous prime is 71484875743. The next prime is 71484875779. The reversal of 71484875765 is 56757848417.

It can be written as a sum of positive squares in 8 ways, for example, as 1675837969 + 69809037796 = 40937^2 + 264214^2 .

It is a de Polignac number, because none of the positive numbers 2^k-71484875765 is a prime.

It is a super-2 number, since 2×71484875765² (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 = 71484875698 and 71484875707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609485 + ... + 717245.

It is an arithmetic number, because the mean of its divisors is an integer number (5398391271).

Almost surely, 2^71484875765 is an apocalyptic number.

It is an amenable number.

71484875765 is a deficient number, since it is larger than the sum of its proper divisors (14889384571).

71484875765 is a wasteful number, since it uses less digits than its factorization.

71484875765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108680.

The product of its digits is 52684800, while the sum is 62.

The spelling of 71484875765 in words is "seventy-one billion, four hundred eighty-four million, eight hundred seventy-five thousand, seven hundred sixty-five".