71983254861 has 24 divisors (see below), whose sum is σ = 118839726720. Its totient is φ = 41129748576.

The previous prime is 71983254823. The next prime is 71983254881. The reversal of 71983254861 is 16845238917.

71983254861 is a `hidden beast` number, since 7 + 1 + 9 + 8 + 32 + 548 + 61 = 666.

It is not a de Polignac number, because 71983254861 - 2¹⁴ = 71983238477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71983254798 and 71983254807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71983254881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 805735 + ... + 890603.

It is an arithmetic number, because the mean of its divisors is an integer number (4951655280).

Almost surely, 2^71983254861 is an apocalyptic number.

It is an amenable number.

71983254861 is a deficient number, since it is larger than the sum of its proper divisors (46856471859).

71983254861 is a wasteful number, since it uses less digits than its factorization.

71983254861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98345 (or 98342 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 71983254861 in words is "seventy-one billion, nine hundred eighty-three million, two hundred fifty-four thousand, eight hundred sixty-one".