180402224450 has 54 divisors (see below), whose sum is σ = 390377000043. Its totient is φ = 61844983200.

The previous prime is 180402224449. The next prime is 180402224531. The reversal of 180402224450 is 54422204081.

It can be written as a sum of positive squares in 5 ways, for example, as 2877356881 + 177524867569 = 53641^2 + 421337^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=300335.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21019160 + ... + 21027740.

Almost surely, 2^180402224450 is an apocalyptic number.

180402224450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

180402224450 is an abundant number, since it is smaller than the sum of its proper divisors (209974775593).

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

180402224450 is an frugal number, since it uses more digits than its factorization.

180402224450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17188 (or 8595 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 32.

Multiplying 180402224450 by its sum of digits (32), we get a square (5772871182400 = 2402680²).

The spelling of 180402224450 in words is "one hundred eighty billion, four hundred two million, two hundred twenty-four thousand, four hundred fifty".