128992469918 has 8 divisors (see below), whose sum is σ = 208372451448. Its totient is φ = 59534986104.

The previous prime is 128992469917. The next prime is 128992469951. The reversal of 128992469918 is 819964299821.

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

It is a super-2 number, since 2×128992469918² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128992469917) 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, 2480624396 + ... + 2480624447.

It is an arithmetic number, because the mean of its divisors is an integer number (26046556431).

Almost surely, 2^128992469918 is an apocalyptic number.

128992469918 is a deficient number, since it is larger than the sum of its proper divisors (79379981530).

128992469918 is a wasteful number, since it uses less digits than its factorization.

128992469918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4961248858.

The product of its digits is 40310784, while the sum is 68.

The spelling of 128992469918 in words is "one hundred twenty-eight billion, nine hundred ninety-two million, four hundred sixty-nine thousand, nine hundred eighteen".