71520705802766 has 24 divisors (see below), whose sum is σ = 119581354719792. Its totient is φ = 32051532682400.

The previous prime is 71520705802717. The next prime is 71520705802769. The reversal of 71520705802766 is 66720850702517.

It is a super-2 number, since 2×71520705802766² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71520705802769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2081251175 + ... + 2081285538.

It is an arithmetic number, because the mean of its divisors is an integer number (4982556446658).

Almost surely, 2^{71520705802766} is an apocalyptic number.

71520705802766 is a deficient number, since it is larger than the sum of its proper divisors (48060648917026).

71520705802766 is a wasteful number, since it uses less digits than its factorization.

71520705802766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4162536808 (or 4162536797 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 71520705802766 in words is "seventy-one trillion, five hundred twenty billion, seven hundred five million, eight hundred two thousand, seven hundred sixty-six".