161905564230 has 32 divisors (see below), whose sum is σ = 388597678848. Its totient is φ = 43172114400.

The previous prime is 161905564229. The next prime is 161905564243. The reversal of 161905564230 is 32465509161.

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, 343815 + ... + 664845.

It is an arithmetic number, because the mean of its divisors is an integer number (12143677464).

Almost surely, 2^161905564230 is an apocalyptic number.

161905564230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161905564230 is an abundant number, since it is smaller than the sum of its proper divisors (226692114618).

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

161905564230 is a wasteful number, since it uses less digits than its factorization.

161905564230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337852.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 161905564230 in words is "one hundred sixty-one billion, nine hundred five million, five hundred sixty-four thousand, two hundred thirty".