128621100927 has 16 divisors (see below), whose sum is σ = 192141597312. Its totient is φ = 75845365920.

The previous prime is 128621100919. The next prime is 128621100941. The reversal of 128621100927 is 729001126821.

It is not a de Polignac number, because 128621100927 - 2³ = 128621100919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128621100427) 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, 52669173 + ... + 52671614.

It is an arithmetic number, because the mean of its divisors is an integer number (12008849832).

Almost surely, 2^128621100927 is an apocalyptic number.

128621100927 is a deficient number, since it is larger than the sum of its proper divisors (63520496385).

128621100927 is a wasteful number, since it uses less digits than its factorization.

128621100927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105340838.

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 128621100927 in words is "one hundred twenty-eight billion, six hundred twenty-one million, one hundred thousand, nine hundred twenty-seven".