71876858681 has 4 divisors (see below), whose sum is σ = 71899121700. Its totient is φ = 71854595664.

The previous prime is 71876858623. The next prime is 71876858689. The reversal of 71876858681 is 18685867817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18685867817 = 179 ⋅104390323.

It can be written as a sum of positive squares in 2 ways, for example, as 15585025600 + 56291833081 = 124840^2 + 237259^2 .

It is a cyclic number.

It is not a de Polignac number, because 71876858681 - 2¹⁸ = 71876596537 is a prime.

It is a super-2 number, since 2×71876858681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71876858689) 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, 11126666 + ... + 11133123.

It is an arithmetic number, because the mean of its divisors is an integer number (17974780425).

Almost surely, 2^71876858681 is an apocalyptic number.

It is an amenable number.

71876858681 is a deficient number, since it is larger than the sum of its proper divisors (22263019).

71876858681 is a wasteful number, since it uses less digits than its factorization.

71876858681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22263018.

The product of its digits is 36126720, while the sum is 65.

The spelling of 71876858681 in words is "seventy-one billion, eight hundred seventy-six million, eight hundred fifty-eight thousand, six hundred eighty-one".