161652505344 has 288 divisors, whose sum is σ = 475064975616. Its totient is φ = 48392847360.

The previous prime is 161652505337. The next prime is 161652505349. The reversal of 161652505344 is 443505256161.

It is a super-2 number, since 2×161652505344² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161652505296 and 161652505305.

It is not an unprimeable number, because it can be changed into a prime (161652505349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407184954 + ... + 407185350.

Almost surely, 2^161652505344 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 161652505344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237532487808).

161652505344 is an abundant number, since it is smaller than the sum of its proper divisors (313412470272).

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

161652505344 is a wasteful number, since it uses less digits than its factorization.

161652505344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 161652505344 in words is "one hundred sixty-one billion, six hundred fifty-two million, five hundred five thousand, three hundred forty-four".