42550991220 has 48 divisors (see below), whose sum is σ = 122986096128. Its totient is φ = 10980900480.

The previous prime is 42550991209. The next prime is 42550991227. The reversal of 42550991220 is 2219905524.

42550991220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42550991227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11436579 + ... + 11440298.

It is an arithmetic number, because the mean of its divisors is an integer number (2562210336).

Almost surely, 2^42550991220 is an apocalyptic number.

It is an amenable number.

42550991220 is an abundant number, since it is smaller than the sum of its proper divisors (80435104908).

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

42550991220 is a wasteful number, since it uses less digits than its factorization.

42550991220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22876920 (or 22876918 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 42550991220 in words is "forty-two billion, five hundred fifty million, nine hundred ninety-one thousand, two hundred twenty".