161601160101554 has 16 divisors (see below), whose sum is σ = 250772531964696. Its totient is φ = 78049340784000.

The previous prime is 161601160101461. The next prime is 161601160101611. The reversal of 161601160101554 is 455101061106161.

161601160101554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 127535575717225 + 34065584384329 = 11293165^2 + 5836573^2 .

It is a super-2 number, since 2×161601160101554² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9756159317 + ... + 9756175880.

Almost surely, 2^{161601160101554} is an apocalyptic number.

161601160101554 is a deficient number, since it is larger than the sum of its proper divisors (89171371863142).

161601160101554 is a wasteful number, since it uses less digits than its factorization.

161601160101554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19512335341.

The product of its (nonzero) digits is 21600, while the sum is 38.

The spelling of 161601160101554 in words is "one hundred sixty-one trillion, six hundred one billion, one hundred sixty million, one hundred one thousand, five hundred fifty-four".