161003447792 has 80 divisors (see below), whose sum is σ = 355694734080. Its totient is φ = 69883968000.

The previous prime is 161003447779. The next prime is 161003447807. The reversal of 161003447792 is 297744300161.

It is a happy number.

It is a super-2 number, since 2×161003447792² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2399759 + ... + 2465937.

It is an arithmetic number, because the mean of its divisors is an integer number (4446184176).

Almost surely, 2^161003447792 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 161003447792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177847367040).

161003447792 is an abundant number, since it is smaller than the sum of its proper divisors (194691286288).

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

161003447792 is a wasteful number, since it uses less digits than its factorization.

161003447792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66822 (or 66816 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 161003447792 in words is "one hundred sixty-one billion, three million, four hundred forty-seven thousand, seven hundred ninety-two".