120451145550 has 48 divisors (see below), whose sum is σ = 300723721200. Its totient is φ = 31904727040.

The previous prime is 120451145531. The next prime is 120451145561. The reversal of 120451145550 is 55541154021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2672307 + ... + 2717006.

It is an arithmetic number, because the mean of its divisors is an integer number (6265077525).

Almost surely, 2^120451145550 is an apocalyptic number.

120451145550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120451145550 is an abundant number, since it is smaller than the sum of its proper divisors (180272575650).

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

120451145550 is a wasteful number, since it uses less digits than its factorization.

120451145550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5389477 (or 5389472 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 33.

Adding to 120451145550 its reverse (55541154021), we get a palindrome (175992299571).

The spelling of 120451145550 in words is "one hundred twenty billion, four hundred fifty-one million, one hundred forty-five thousand, five hundred fifty".