161434563201 has 6 divisors (see below), whose sum is σ = 233183257970. Its totient is φ = 107623042128.

The previous prime is 161434563197. The next prime is 161434563247. The reversal of 161434563201 is 102365434161.

161434563201 is a `hidden beast` number, since 1 + 6 + 14 + 3 + 4 + 5 + 632 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 157927554801 + 3507008400 = 397401^2 + 59220^2 .

It is not a de Polignac number, because 161434563201 - 2² = 161434563197 is a prime.

It is a super-2 number, since 2×161434563201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161434363201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8968586836 + ... + 8968586853.

Almost surely, 2^161434563201 is an apocalyptic number.

It is an amenable number.

161434563201 is a deficient number, since it is larger than the sum of its proper divisors (71748694769).

161434563201 is a wasteful number, since it uses less digits than its factorization.

161434563201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17937173695 (or 17937173692 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 161434563201 its reverse (102365434161), we get a palindrome (263799997362).

The spelling of 161434563201 in words is "one hundred sixty-one billion, four hundred thirty-four million, five hundred sixty-three thousand, two hundred one".