128456627398 has 16 divisors (see below), whose sum is σ = 210877655040. Its totient is φ = 58201625800.

The previous prime is 128456627381. The next prime is 128456627399. The reversal of 128456627398 is 893726654821.

It is a super-2 number, since 2×128456627398² (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 (128456627399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9380518 + ... + 9394201.

It is an arithmetic number, because the mean of its divisors is an integer number (13179853440).

Almost surely, 2^128456627398 is an apocalyptic number.

128456627398 is a deficient number, since it is larger than the sum of its proper divisors (82421027642).

128456627398 is a wasteful number, since it uses less digits than its factorization.

128456627398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18775043.

The product of its digits is 34836480, while the sum is 61.

The spelling of 128456627398 in words is "one hundred twenty-eight billion, four hundred fifty-six million, six hundred twenty-seven thousand, three hundred ninety-eight".