128252999018 has 16 divisors (see below), whose sum is σ = 197552701440. Its totient is φ = 62421152976.

The previous prime is 128252998999. The next prime is 128252999051. The reversal of 128252999018 is 810999252821.

It is a super-2 number, since 2×128252999018² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4750058 + ... + 4776981.

It is an arithmetic number, because the mean of its divisors is an integer number (12347043840).

Almost surely, 2^128252999018 is an apocalyptic number.

128252999018 is a deficient number, since it is larger than the sum of its proper divisors (69299702422).

128252999018 is a wasteful number, since it uses less digits than its factorization.

128252999018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9527221.

The product of its (nonzero) digits is 1866240, while the sum is 56.

The spelling of 128252999018 in words is "one hundred twenty-eight billion, two hundred fifty-two million, nine hundred ninety-nine thousand, eighteen".