219057128802 has 54 divisors (see below), whose sum is σ = 479566116939. Its totient is φ = 72266460360.

The previous prime is 219057128791. The next prime is 219057128821. The reversal of 219057128802 is 208821750912.

It can be written as a sum of positive squares in only one way, i.e., 109528564401 + 109528564401 = 330951^2 + 330951^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=330951.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 212470027 + ... + 212471057.

Almost surely, 2^219057128802 is an apocalyptic number.

219057128802 is an abundant number, since it is smaller than the sum of its proper divisors (260508988137).

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

219057128802 is an equidigital number, since it uses as much as digits as its factorization.

219057128802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 219057128802 in words is "two hundred nineteen billion, fifty-seven million, one hundred twenty-eight thousand, eight hundred two".