128106500993 has 16 divisors (see below), whose sum is σ = 138006192960. Its totient is φ = 118471405056.

The previous prime is 128106500983. The next prime is 128106501001. The reversal of 128106500993 is 399005601821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 128106500993 - 2¹² = 128106496897 is a prime.

It is a super-2 number, since 2×128106500993² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128106500903) 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, 2180621 + ... + 2238597.

It is an arithmetic number, because the mean of its divisors is an integer number (8625387060).

Almost surely, 2^128106500993 is an apocalyptic number.

It is an amenable number.

128106500993 is a deficient number, since it is larger than the sum of its proper divisors (9899691967).

128106500993 is a wasteful number, since it uses less digits than its factorization.

128106500993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60256.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 128106500993 in words is "one hundred twenty-eight billion, one hundred six million, five hundred thousand, nine hundred ninety-three".