1612172166201 has 6 divisors (see below), whose sum is σ = 2328693128970. Its totient is φ = 1074781444128.

The previous prime is 1612172166181. The next prime is 1612172166203. The reversal of 1612172166201 is 1026612712161.

1612172166201 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 1 + 7 + 21 + 6 + 620 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1575414074025 + 36758092176 = 1255155^2 + 191724^2 .

It is not a de Polignac number, because 1612172166201 - 2⁹ = 1612172165689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1612172166203) 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, 89565120336 + ... + 89565120353.

It is an arithmetic number, because the mean of its divisors is an integer number (388115521495).

Almost surely, 2^{1612172166201} is an apocalyptic number.

It is an amenable number.

1612172166201 is a deficient number, since it is larger than the sum of its proper divisors (716520962769).

1612172166201 is a wasteful number, since it uses less digits than its factorization.

1612172166201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179130240695 (or 179130240692 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

Adding to 1612172166201 its reverse (1026612712161), we get a palindrome (2638784878362).

The spelling of 1612172166201 in words is "one trillion, six hundred twelve billion, one hundred seventy-two million, one hundred sixty-six thousand, two hundred one".