161145452552 has 128 divisors (see below), whose sum is σ = 388112947200. Its totient is φ = 61126990848.

The previous prime is 161145452467. The next prime is 161145452639. The reversal of 161145452552 is 255254541161.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 975728 + ... + 1128864.

It is an arithmetic number, because the mean of its divisors is an integer number (3032132400).

Almost surely, 2^161145452552 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 161145452552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194056473600).

161145452552 is an abundant number, since it is smaller than the sum of its proper divisors (226967494648).

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

161145452552 is a wasteful number, since it uses less digits than its factorization.

161145452552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153235 (or 153231 counting only the distinct ones).

The product of its digits is 240000, while the sum is 41.

The spelling of 161145452552 in words is "one hundred sixty-one billion, one hundred forty-five million, four hundred fifty-two thousand, five hundred fifty-two".