128131850642 has 8 divisors (see below), whose sum is σ = 192215732016. Its totient is φ = 64059939972.

The previous prime is 128131850641. The next prime is 128131850653. The reversal of 128131850642 is 246058131821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×128131850642² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128131850642.

It is not an unprimeable number, because it can be changed into a prime (128131850641) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2965868 + ... + 3008759.

It is an arithmetic number, because the mean of its divisors is an integer number (24026966502).

Almost surely, 2^128131850642 is an apocalyptic number.

128131850642 is a deficient number, since it is larger than the sum of its proper divisors (64083881374).

128131850642 is a wasteful number, since it uses less digits than its factorization.

128131850642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985352.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 128131850642 in words is "one hundred twenty-eight billion, one hundred thirty-one million, eight hundred fifty thousand, six hundred forty-two".