161803327345 has 96 divisors (see below), whose sum is σ = 230240568960. Its totient is φ = 108206039040.

The previous prime is 161803327331. The next prime is 161803327369. The reversal of 161803327345 is 543723308161.

It is not a de Polignac number, because 161803327345 - 2³⁵ = 127443588977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 145899651 + ... + 145900759.

It is an arithmetic number, because the mean of its divisors is an integer number (2398339260).

Almost surely, 2^161803327345 is an apocalyptic number.

It is an amenable number.

161803327345 is a deficient number, since it is larger than the sum of its proper divisors (68437241615).

161803327345 is a wasteful number, since it uses less digits than its factorization.

161803327345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 161803327345 in words is "one hundred sixty-one billion, eight hundred three million, three hundred twenty-seven thousand, three hundred forty-five".