161205670601701 has 16 divisors (see below), whose sum is σ = 176129530993728. Its totient is φ = 146326617043200.

The previous prime is 161205670601693. The next prime is 161205670601737. The reversal of 161205670601701 is 107106076502161.

It is a happy number.

It is not a de Polignac number, because 161205670601701 - 2³ = 161205670601693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161205670601761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618100941 + ... + 618361693.

It is an arithmetic number, because the mean of its divisors is an integer number (11008095687108).

Almost surely, 2^{161205670601701} is an apocalyptic number.

161205670601701 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161205670601701 is a deficient number, since it is larger than the sum of its proper divisors (14923860392027).

161205670601701 is a wasteful number, since it uses less digits than its factorization.

161205670601701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346452.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 161205670601701 in words is "one hundred sixty-one trillion, two hundred five billion, six hundred seventy million, six hundred one thousand, seven hundred one".