161500671245 has 32 divisors (see below), whose sum is σ = 214618263552. Its totient is φ = 116044296192.

The previous prime is 161500671223. The next prime is 161500671257. The reversal of 161500671245 is 542176005161.

It is a cyclic number.

It is not a de Polignac number, because 161500671245 - 2¹² = 161500667149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161500671199 and 161500671208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 751124 + ... + 941906.

It is an arithmetic number, because the mean of its divisors is an integer number (6706820736).

Almost surely, 2^161500671245 is an apocalyptic number.

It is an amenable number.

161500671245 is a deficient number, since it is larger than the sum of its proper divisors (53117592307).

161500671245 is a wasteful number, since it uses less digits than its factorization.

161500671245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191261.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 161500671245 in words is "one hundred sixty-one billion, five hundred million, six hundred seventy-one thousand, two hundred forty-five".