128218772073 has 8 divisors (see below), whose sum is σ = 195380986048. Its totient is φ = 73267869744.

The previous prime is 128218772069. The next prime is 128218772117. The reversal of 128218772073 is 370277812821.

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

It is not a de Polignac number, because 128218772073 - 2² = 128218772069 is a prime.

It is a super-3 number, since 3×128218772073³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128218792073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3052827886 + ... + 3052827927.

It is an arithmetic number, because the mean of its divisors is an integer number (24422623256).

Almost surely, 2^128218772073 is an apocalyptic number.

It is an amenable number.

128218772073 is a deficient number, since it is larger than the sum of its proper divisors (67162213975).

128218772073 is an equidigital number, since it uses as much as digits as its factorization.

128218772073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6105655823.

The product of its (nonzero) digits is 526848, while the sum is 48.

The spelling of 128218772073 in words is "one hundred twenty-eight billion, two hundred eighteen million, seven hundred seventy-two thousand, seventy-three".