71515073765 has 16 divisors (see below), whose sum is σ = 90929164032. Its totient is φ = 53809338624.

The previous prime is 71515073743. The next prime is 71515073779. The reversal of 71515073765 is 56737051517.

It is a cyclic number.

It is not a de Polignac number, because 71515073765 - 2³⁰ = 70441331941 is a prime.

It is a super-2 number, since 2×71515073765² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167729 + ... + 413718.

It is an arithmetic number, because the mean of its divisors is an integer number (5683072752).

Almost surely, 2^71515073765 is an apocalyptic number.

It is an amenable number.

71515073765 is a deficient number, since it is larger than the sum of its proper divisors (19414090267).

71515073765 is a wasteful number, since it uses less digits than its factorization.

71515073765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582916.

The product of its (nonzero) digits is 771750, while the sum is 47.

The spelling of 71515073765 in words is "seventy-one billion, five hundred fifteen million, seventy-three thousand, seven hundred sixty-five".