161775047148 has 192 divisors, whose sum is σ = 484703170560. Its totient is φ = 41215795200.

The previous prime is 161775047111. The next prime is 161775047149. The reversal of 161775047148 is 841740577161.

161775047148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 161775047148.

It is not an unprimeable number, because it can be changed into a prime (161775047149) 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 63 ways as a sum of consecutive naturals, for example, 814888 + ... + 993776.

It is an arithmetic number, because the mean of its divisors is an integer number (2524495680).

Almost surely, 2^161775047148 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 161775047148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242351585280).

161775047148 is an abundant number, since it is smaller than the sum of its proper divisors (322928123412).

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

161775047148 is a wasteful number, since it uses less digits than its factorization.

161775047148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178968 (or 178966 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 51.

The spelling of 161775047148 in words is "one hundred sixty-one billion, seven hundred seventy-five million, forty-seven thousand, one hundred forty-eight".