161545987338 has 16 divisors (see below), whose sum is σ = 328568110560. Its totient is φ = 52935973136.

The previous prime is 161545987331. The next prime is 161545987433. The reversal of 161545987338 is 833789545161.

It is not an unprimeable number, because it can be changed into a prime (161545987331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228171945 + ... + 228172652.

It is an arithmetic number, because the mean of its divisors is an integer number (20535506910).

Almost surely, 2^161545987338 is an apocalyptic number.

161545987338 is an abundant number, since it is smaller than the sum of its proper divisors (167022123222).

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

161545987338 is a wasteful number, since it uses less digits than its factorization.

161545987338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456344661.

The product of its digits is 21772800, while the sum is 60.

The spelling of 161545987338 in words is "one hundred sixty-one billion, five hundred forty-five million, nine hundred eighty-seven thousand, three hundred thirty-eight".