161914428641 has 16 divisors (see below), whose sum is σ = 194070691584. Its totient is φ = 132075835584.

The previous prime is 161914428631. The next prime is 161914428649. The reversal of 161914428641 is 146824419161.

161914428641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161914428641 - 2¹⁰ = 161914427617 is a prime.

It is a super-2 number, since 2×161914428641² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161914428649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2520770 + ... + 2584203.

It is an arithmetic number, because the mean of its divisors is an integer number (12129418224).

Almost surely, 2^161914428641 is an apocalyptic number.

It is an amenable number.

161914428641 is a deficient number, since it is larger than the sum of its proper divisors (32156262943).

161914428641 is a wasteful number, since it uses less digits than its factorization.

161914428641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105200.

The product of its digits is 331776, while the sum is 47.

The spelling of 161914428641 in words is "one hundred sixty-one billion, nine hundred fourteen million, four hundred twenty-eight thousand, six hundred forty-one".