161946019264 has 56 divisors (see below), whose sum is σ = 325605495600. Its totient is φ = 79909632000.

The previous prime is 161946019237. The next prime is 161946019267. The reversal of 161946019264 is 462910649161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161946019267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1704732 + ... + 1797220.

It is an arithmetic number, because the mean of its divisors is an integer number (5814383850).

Almost surely, 2^161946019264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161946019264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162802747800).

161946019264 is an abundant number, since it is smaller than the sum of its proper divisors (163659476336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161946019264 is a wasteful number, since it uses less digits than its factorization.

161946019264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92861 (or 92851 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 161946019264 in words is "one hundred sixty-one billion, nine hundred forty-six million, nineteen thousand, two hundred sixty-four".