128317891460 has 24 divisors (see below), whose sum is σ = 293964624576. Its totient is φ = 46661051360.

The previous prime is 128317891399. The next prime is 128317891463. The reversal of 128317891460 is 64198713821.

It is a happy number.

It is a super-3 number, since 3×128317891460³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128317891399 and 128317891408.

It is not an unprimeable number, because it can be changed into a prime (128317891463) 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, 291631352 + ... + 291631791.

It is an arithmetic number, because the mean of its divisors is an integer number (12248526024).

Almost surely, 2^128317891460 is an apocalyptic number.

128317891460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128317891460 is an abundant number, since it is smaller than the sum of its proper divisors (165646733116).

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

128317891460 is a wasteful number, since it uses less digits than its factorization.

128317891460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583263163 (or 583263161 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 128317891460 in words is "one hundred twenty-eight billion, three hundred seventeen million, eight hundred ninety-one thousand, four hundred sixty".