80917189547 has 4 divisors (see below), whose sum is σ = 80934487920. Its totient is φ = 80899891176.

The previous prime is 80917189517. The next prime is 80917189559. The reversal of 80917189547 is 74598171908.

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

It is a cyclic number.

It is not a de Polignac number, because 80917189547 - 2⁸ = 80917189291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80917189517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8642168 + ... + 8651525.

It is an arithmetic number, because the mean of its divisors is an integer number (20233621980).

Almost surely, 2^80917189547 is an apocalyptic number.

80917189547 is a deficient number, since it is larger than the sum of its proper divisors (17298373).

80917189547 is a wasteful number, since it uses less digits than its factorization.

80917189547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17298372.

The product of its (nonzero) digits is 5080320, while the sum is 59.

The spelling of 80917189547 in words is "eighty billion, nine hundred seventeen million, one hundred eighty-nine thousand, five hundred forty-seven".