161500671247 has 6 divisors (see below), whose sum is σ = 163115529944. Its totient is φ = 159901644600.

The previous prime is 161500671223. The next prime is 161500671257. The reversal of 161500671247 is 742176005161.

It is a de Polignac number, because none of the positive numbers 2^k-161500671247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161500671257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7905723 + ... + 7926124.

Almost surely, 2^161500671247 is an apocalyptic number.

161500671247 is a deficient number, since it is larger than the sum of its proper divisors (1614858697).

161500671247 is an equidigital number, since it uses as much as digits as its factorization.

161500671247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15832049 (or 15831948 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 161500671247 in words is "one hundred sixty-one billion, five hundred million, six hundred seventy-one thousand, two hundred forty-seven".