55512210450 has 48 divisors (see below), whose sum is σ = 137852426880. Its totient is φ = 14783670720.

The previous prime is 55512210421. The next prime is 55512210451. The reversal of 55512210450 is 5401221555.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (55512210451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130890 + ... + 357989.

It is an arithmetic number, because the mean of its divisors is an integer number (2871925560).

Almost surely, 2^55512210450 is an apocalyptic number.

55512210450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55512210450 is an abundant number, since it is smaller than the sum of its proper divisors (82340216430).

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

55512210450 is a wasteful number, since it uses less digits than its factorization.

55512210450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489651 (or 489646 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 55512210450 in words is "fifty-five billion, five hundred twelve million, two hundred ten thousand, four hundred fifty".