128241791949 has 8 divisors (see below), whose sum is σ = 175610381920. Its totient is φ = 83183864976.

The previous prime is 128241791947. The next prime is 128241791963. The reversal of 128241791949 is 949197142821.

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

It is not a de Polignac number, because 128241791949 - 2¹ = 128241791947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128241791947) 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, 577665619 + ... + 577665840.

It is an arithmetic number, because the mean of its divisors is an integer number (21951297740).

Almost surely, 2^128241791949 is an apocalyptic number.

It is an amenable number.

128241791949 is a deficient number, since it is larger than the sum of its proper divisors (47368589971).

128241791949 is a wasteful number, since it uses less digits than its factorization.

128241791949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155331499.

The product of its digits is 2612736, while the sum is 57.

The spelling of 128241791949 in words is "one hundred twenty-eight billion, two hundred forty-one million, seven hundred ninety-one thousand, nine hundred forty-nine".