128249473881 has 8 divisors (see below), whose sum is σ = 171072042624. Its totient is φ = 85463277200.

The previous prime is 128249473841. The next prime is 128249473907. The reversal of 128249473881 is 188374942821.

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

It is a cyclic number.

It is not a de Polignac number, because 128249473881 - 2¹⁸ = 128249211737 is a prime.

It is a super-2 number, since 2×128249473881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128249473841) 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, 9084786 + ... + 9098891.

It is an arithmetic number, because the mean of its divisors is an integer number (21384005328).

Almost surely, 2^128249473881 is an apocalyptic number.

It is an amenable number.

128249473881 is a deficient number, since it is larger than the sum of its proper divisors (42822568743).

128249473881 is a wasteful number, since it uses less digits than its factorization.

128249473881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18186031.

The product of its digits is 6193152, while the sum is 57.

The spelling of 128249473881 in words is "one hundred twenty-eight billion, two hundred forty-nine million, four hundred seventy-three thousand, eight hundred eighty-one".