173488180991 has 2 divisors, whose sum is σ = 173488180992. Its totient is φ = 173488180990.

The previous prime is 173488180969. The next prime is 173488181003. The reversal of 173488180991 is 199081884371.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173488180991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 173488180991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173488180951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86744090495 + 86744090496.

It is an arithmetic number, because the mean of its divisors is an integer number (86744090496).

Almost surely, 2^173488180991 is an apocalyptic number.

173488180991 is a deficient number, since it is larger than the sum of its proper divisors (1).

173488180991 is an equidigital number, since it uses as much as digits as its factorization.

173488180991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 59.

The spelling of 173488180991 in words is "one hundred seventy-three billion, four hundred eighty-eight million, one hundred eighty thousand, nine hundred ninety-one".