128949100441 has 4 divisors (see below), whose sum is σ = 147370400512. Its totient is φ = 110527800372.

The previous prime is 128949100439. The next prime is 128949100453. The reversal of 128949100441 is 144001949821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144001949821 = 227 ⋅634369823.

It is a cyclic number.

It is not a de Polignac number, because 128949100441 - 2¹ = 128949100439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128949100411) 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, 9210650025 + ... + 9210650038.

It is an arithmetic number, because the mean of its divisors is an integer number (36842600128).

Almost surely, 2^128949100441 is an apocalyptic number.

It is an amenable number.

128949100441 is a deficient number, since it is larger than the sum of its proper divisors (18421300071).

128949100441 is an equidigital number, since it uses as much as digits as its factorization.

128949100441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18421300070.

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

The spelling of 128949100441 in words is "one hundred twenty-eight billion, nine hundred forty-nine million, one hundred thousand, four hundred forty-one".