128806111312630 has 32 divisors (see below), whose sum is σ = 234795368567520. Its totient is φ = 50869816039680.

The previous prime is 128806111312603. The next prime is 128806111312631. The reversal of 128806111312630 is 36213111608821.

It is a super-2 number, since 2×128806111312630² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128806111312631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104107129 + ... + 105337108.

It is an arithmetic number, because the mean of its divisors is an integer number (7337355267735).

Almost surely, 2^{128806111312630} is an apocalyptic number.

128806111312630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128806111312630 is a deficient number, since it is larger than the sum of its proper divisors (105989257254890).

128806111312630 is a wasteful number, since it uses less digits than its factorization.

128806111312630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209445024.

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 128806111312630 in words is "one hundred twenty-eight trillion, eight hundred six billion, one hundred eleven million, three hundred twelve thousand, six hundred thirty".