161566568096635 has 16 divisors (see below), whose sum is σ = 211139715618720. Its totient is φ = 117970126813440.

The previous prime is 161566568096629. The next prime is 161566568096657. The reversal of 161566568096635 is 536690865665161.

It is a de Polignac number, because none of the positive numbers 2^k-161566568096635 is a prime.

It is a super-2 number, since 2×161566568096635² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13964261121 + ... + 13964272690.

It is an arithmetic number, because the mean of its divisors is an integer number (13196232226170).

Almost surely, 2^{161566568096635} is an apocalyptic number.

161566568096635 is a deficient number, since it is larger than the sum of its proper divisors (49573147522085).

161566568096635 is a wasteful number, since it uses less digits than its factorization.

161566568096635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27928533918.

The product of its (nonzero) digits is 1259712000, while the sum is 73.

The spelling of 161566568096635 in words is "one hundred sixty-one trillion, five hundred sixty-six billion, five hundred sixty-eight million, ninety-six thousand, six hundred thirty-five".