128593395821 has 8 divisors (see below), whose sum is σ = 140286432000. Its totient is φ = 116900814240.

The previous prime is 128593395803. The next prime is 128593395823.

It is a happy number.

128593395821 is nontrivially palindromic in base 10.

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 128593395821 - 2¹⁴ = 128593379437 is a prime.

It is a super-2 number, since 2×128593395821² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128593395823) 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, 790820 + ... + 939458.

It is an arithmetic number, because the mean of its divisors is an integer number (17535804000).

Almost surely, 2^128593395821 is an apocalyptic number.

128593395821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128593395821 is a deficient number, since it is larger than the sum of its proper divisors (11693036179).

128593395821 is a wasteful number, since it uses less digits than its factorization.

128593395821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227299.

The product of its digits is 4665600, while the sum is 56.

The spelling of 128593395821 in words is "one hundred twenty-eight billion, five hundred ninety-three million, three hundred ninety-five thousand, eight hundred twenty-one".