161427358220 has 24 divisors (see below), whose sum is σ = 339019019808. Its totient is φ = 64566835200.

The previous prime is 161427358181. The next prime is 161427358223. The reversal of 161427358220 is 22853724161.

It is not an unprimeable number, because it can be changed into a prime (161427358223) 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, 75980 + ... + 573260.

It is an arithmetic number, because the mean of its divisors is an integer number (14125792492).

Almost surely, 2^161427358220 is an apocalyptic number.

161427358220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161427358220 is an abundant number, since it is smaller than the sum of its proper divisors (177591661588).

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

161427358220 is a wasteful number, since it uses less digits than its factorization.

161427358220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513521 (or 513519 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 161427358220 in words is "one hundred sixty-one billion, four hundred twenty-seven million, three hundred fifty-eight thousand, two hundred twenty".