161545133320 has 32 divisors (see below), whose sum is σ = 365883693120. Its totient is φ = 64190116800.

The previous prime is 161545133297. The next prime is 161545133333. The reversal of 161545133320 is 23331545161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13366902 + ... + 13378981.

It is an arithmetic number, because the mean of its divisors is an integer number (11433865410).

Almost surely, 2^161545133320 is an apocalyptic number.

161545133320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161545133320 is an abundant number, since it is smaller than the sum of its proper divisors (204338559800).

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

161545133320 is a wasteful number, since it uses less digits than its factorization.

161545133320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26746045 (or 26746041 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 161545133320 its reverse (23331545161), we get a palindrome (184876678481).

The spelling of 161545133320 in words is "one hundred sixty-one billion, five hundred forty-five million, one hundred thirty-three thousand, three hundred twenty".