161140220550 has 36 divisors (see below), whose sum is σ = 432930060420. Its totient is φ = 42970725360.

The previous prime is 161140220543. The next prime is 161140220597. The reversal of 161140220550 is 55022041161.

161140220550 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 402 + 205 + 50 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 179044240 + ... + 179045139.

Almost surely, 2^161140220550 is an apocalyptic number.

161140220550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161140220550 is an abundant number, since it is smaller than the sum of its proper divisors (271789839870).

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

161140220550 is a wasteful number, since it uses less digits than its factorization.

161140220550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358089397 (or 358089389 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 161140220550 in words is "one hundred sixty-one billion, one hundred forty million, two hundred twenty thousand, five hundred fifty".