161645546162101 has 16 divisors (see below), whose sum is σ = 164394394214400. Its totient is φ = 158918204790400.

The previous prime is 161645546162083. The next prime is 161645546162183. The reversal of 161645546162101 is 101261645546161.

It is a cyclic number.

It is not a de Polignac number, because 161645546162101 - 2²³ = 161645537773493 is a prime.

It is a super-2 number, since 2×161645546162101² (a number of 29 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 (161645546162701) 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, 34174140 + ... + 38615578.

It is an arithmetic number, because the mean of its divisors is an integer number (10274649638400).

Almost surely, 2^{161645546162101} is an apocalyptic number.

It is an amenable number.

161645546162101 is a deficient number, since it is larger than the sum of its proper divisors (2748848052299).

161645546162101 is a wasteful number, since it uses less digits than its factorization.

161645546162101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443860.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 161645546162101 in words is "one hundred sixty-one trillion, six hundred forty-five billion, five hundred forty-six million, one hundred sixty-two thousand, one hundred one".