128213587882356 has 96 divisors (see below), whose sum is σ = 318841487032320. Its totient is φ = 40006486527744.

The previous prime is 128213587882283. The next prime is 128213587882399. The reversal of 128213587882356 is 653288785312821.

It is a super-2 number, since 2×128213587882356² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153158080 + ... + 153992936.

It is an arithmetic number, because the mean of its divisors is an integer number (3321265489920).

Almost surely, 2^{128213587882356} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128213587882356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159420743516160).

128213587882356 is an abundant number, since it is smaller than the sum of its proper divisors (190627899149964).

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

128213587882356 is a wasteful number, since it uses less digits than its factorization.

128213587882356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846773 (or 846771 counting only the distinct ones).

The product of its digits is 309657600, while the sum is 69.

The spelling of 128213587882356 in words is "one hundred twenty-eight trillion, two hundred thirteen billion, five hundred eighty-seven million, eight hundred eighty-two thousand, three hundred fifty-six".