42155244450 has 144 divisors (see below), whose sum is σ = 127681723680. Its totient is φ = 10219413600.

The previous prime is 42155244449. The next prime is 42155244457. The reversal of 42155244450 is 5444255124.

42155244450 is a `hidden beast` number, since 4 + 21 + 552 + 44 + 45 + 0 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42155244457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 34317 + ... + 292383.

Almost surely, 2^42155244450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42155244450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63840861840).

42155244450 is an abundant number, since it is smaller than the sum of its proper divisors (85526479230).

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

42155244450 is a wasteful number, since it uses less digits than its factorization.

42155244450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258110 (or 258088 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 42155244450 its reverse (5444255124), we get a palindrome (47599499574).

The spelling of 42155244450 in words is "forty-two billion, one hundred fifty-five million, two hundred forty-four thousand, four hundred fifty".