161061656601 has 8 divisors (see below), whose sum is σ = 214861849344. Its totient is φ = 107317950800.

The previous prime is 161061656597. The next prime is 161061656659. The reversal of 161061656601 is 106656160161.

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

It is a cyclic number.

It is not a de Polignac number, because 161061656601 - 2² = 161061656597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161061656601.

It is not an unprimeable number, because it can be changed into a prime (161061656671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14115081 + ... + 14126486.

It is an arithmetic number, because the mean of its divisors is an integer number (26857731168).

Almost surely, 2^161061656601 is an apocalyptic number.

It is an amenable number.

161061656601 is a deficient number, since it is larger than the sum of its proper divisors (53800192743).

161061656601 is a wasteful number, since it uses less digits than its factorization.

161061656601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28243471.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 161061656601 in words is "one hundred sixty-one billion, sixty-one million, six hundred fifty-six thousand, six hundred one".