128333533831 has 16 divisors (see below), whose sum is σ = 133364605248. Its totient is φ = 123394297600.

The previous prime is 128333533829. The next prime is 128333533879. The reversal of 128333533831 is 138335333821.

It is a cyclic number.

It is not a de Polignac number, because 128333533831 - 2¹ = 128333533829 is a prime.

It is a super-2 number, since 2×128333533831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128333533331) 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, 9928785 + ... + 9941701.

It is an arithmetic number, because the mean of its divisors is an integer number (8335287828).

Almost surely, 2^128333533831 is an apocalyptic number.

128333533831 is a deficient number, since it is larger than the sum of its proper divisors (5031071417).

128333533831 is a wasteful number, since it uses less digits than its factorization.

128333533831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16442.

The product of its digits is 466560, while the sum is 43.

The spelling of 128333533831 in words is "one hundred twenty-eight billion, three hundred thirty-three million, five hundred thirty-three thousand, eight hundred thirty-one".