71980676087 has 4 divisors (see below), whose sum is σ = 71981215920. Its totient is φ = 71980136256.

The previous prime is 71980676071. The next prime is 71980676111. The reversal of 71980676087 is 78067608917.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78067608917 = 8287 ⋅9420491.

It is a cyclic number.

It is not a de Polignac number, because 71980676087 - 2⁴ = 71980676071 is a prime.

It is a super-2 number, since 2×71980676087² (a number of 23 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 (71980676987) 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, 90614 + ... + 390092.

It is an arithmetic number, because the mean of its divisors is an integer number (17995303980).

Almost surely, 2^71980676087 is an apocalyptic number.

71980676087 is a deficient number, since it is larger than the sum of its proper divisors (539833).

71980676087 is a wasteful number, since it uses less digits than its factorization.

71980676087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539832.

The product of its (nonzero) digits is 7112448, while the sum is 59.

The spelling of 71980676087 in words is "seventy-one billion, nine hundred eighty million, six hundred seventy-six thousand, eighty-seven".