128531081796 has 48 divisors (see below), whose sum is σ = 329847377664. Its totient is φ = 38706575616.

The previous prime is 128531081779. The next prime is 128531081813. The reversal of 128531081796 is 697180135821.

It is an interprime number because it is at equal distance from previous prime (128531081779) and next prime (128531081813).

It is a super-3 number, since 3×128531081796³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8757745 + ... + 8772408.

It is an arithmetic number, because the mean of its divisors is an integer number (6871820368).

Almost surely, 2^128531081796 is an apocalyptic number.

It is an amenable number.

128531081796 is an abundant number, since it is smaller than the sum of its proper divisors (201316295868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128531081796 is a wasteful number, since it uses less digits than its factorization.

128531081796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17530220 (or 17530218 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 128531081796 in words is "one hundred twenty-eight billion, five hundred thirty-one million, eighty-one thousand, seven hundred ninety-six".