220128915136 has 28 divisors (see below), whose sum is σ = 470419726672. Its totient is φ = 101597960448.

The previous prime is 220128915107. The next prime is 220128915137. The reversal of 220128915136 is 631519821022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (220128915137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132288180 + ... + 132289843.

It is an arithmetic number, because the mean of its divisors is an integer number (16800704524).

Almost surely, 2^220128915136 is an apocalyptic number.

220128915136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

220128915136 is an abundant number, since it is smaller than the sum of its proper divisors (250290811536).

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

220128915136 is a wasteful number, since it uses less digits than its factorization.

220128915136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264578048 (or 264578038 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 220128915136 in words is "two hundred twenty billion, one hundred twenty-eight million, nine hundred fifteen thousand, one hundred thirty-six".