16161605656061 has 8 divisors (see below), whose sum is σ = 16537533777600. Its totient is φ = 15785681026752.

The previous prime is 16161605656013. The next prime is 16161605656081. The reversal of 16161605656061 is 16065650616161.

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 16161605656061 - 2⁶ = 16161605655997 is a prime.

It is a super-2 number, since 2×16161605656061² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161605656081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10066040 + ... + 11560638.

It is an arithmetic number, because the mean of its divisors is an integer number (2067191722200).

Almost surely, 2^{16161605656061} is an apocalyptic number.

It is an amenable number.

16161605656061 is a deficient number, since it is larger than the sum of its proper divisors (375928121539).

16161605656061 is a wasteful number, since it uses less digits than its factorization.

16161605656061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746115.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 16161605656061 in words is "sixteen trillion, one hundred sixty-one billion, six hundred five million, six hundred fifty-six thousand, sixty-one".