145555445220 has 24 divisors (see below), whose sum is σ = 407555246784. Its totient is φ = 38814785376.

The previous prime is 145555445219. The next prime is 145555445227. The reversal of 145555445220 is 22544555541.

It is not an unprimeable number, because it can be changed into a prime (145555445227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1212961984 + ... + 1212962103.

It is an arithmetic number, because the mean of its divisors is an integer number (16981468616).

Almost surely, 2^145555445220 is an apocalyptic number.

145555445220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145555445220 is an abundant number, since it is smaller than the sum of its proper divisors (261999801564).

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

145555445220 is a wasteful number, since it uses less digits than its factorization.

145555445220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425924099 (or 2425924097 counting only the distinct ones).

The product of its (nonzero) digits is 800000, while the sum is 42.

The spelling of 145555445220 in words is "one hundred forty-five billion, five hundred fifty-five million, four hundred forty-five thousand, two hundred twenty".