161730706154 has 8 divisors (see below), whose sum is σ = 242974526148. Its totient is φ = 80739197440.

The previous prime is 161730706103. The next prime is 161730706171. The reversal of 161730706154 is 451607037161.

It can be written as a sum of positive squares in 2 ways, for example, as 131317090129 + 30413616025 = 362377^2 + 174395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63076217 + ... + 63078780.

Almost surely, 2^161730706154 is an apocalyptic number.

161730706154 is a deficient number, since it is larger than the sum of its proper divisors (81243819994).

161730706154 is a wasteful number, since it uses less digits than its factorization.

161730706154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126155640.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 161730706154 in words is "one hundred sixty-one billion, seven hundred thirty million, seven hundred six thousand, one hundred fifty-four".