71045700865877 has 4 divisors (see below), whose sum is σ = 71052285889260. Its totient is φ = 71039115842496.

The previous prime is 71045700865873. The next prime is 71045700865883. The reversal of 71045700865877 is 77856800754017.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14483854846756 + 56561846019121 = 3805766^2 + 7520761^2 .

It is a cyclic number.

It is not a de Polignac number, because 71045700865877 - 2² = 71045700865873 is a prime.

It is a super-2 number, since 2×71045700865877² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71045700865873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3292495508 + ... + 3292517085.

It is an arithmetic number, because the mean of its divisors is an integer number (17763071472315).

Almost surely, 2^{71045700865877} is an apocalyptic number.

It is an amenable number.

71045700865877 is a deficient number, since it is larger than the sum of its proper divisors (6585023383).

71045700865877 is a wasteful number, since it uses less digits than its factorization.

71045700865877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6585023382.

The product of its (nonzero) digits is 92198400, while the sum is 65.

The spelling of 71045700865877 in words is "seventy-one trillion, forty-five billion, seven hundred million, eight hundred sixty-five thousand, eight hundred seventy-seven".