161156606101154 has 4 divisors (see below), whose sum is σ = 241734909151734. Its totient is φ = 80578303050576.

The previous prime is 161156606101039. The next prime is 161156606101171. The reversal of 161156606101154 is 451101606651161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 102395719331929 + 58760886769225 = 10119077^2 + 7665565^2 .

It is a Curzon 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 as a sum of consecutive naturals, namely, 40289151525287 + ... + 40289151525290.

Almost surely, 2^{161156606101154} is an apocalyptic number.

161156606101154 is a deficient number, since it is larger than the sum of its proper divisors (80578303050580).

161156606101154 is an equidigital number, since it uses as much as digits as its factorization.

161156606101154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80578303050579.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 161156606101154 in words is "one hundred sixty-one trillion, one hundred fifty-six billion, six hundred six million, one hundred one thousand, one hundred fifty-four".