128897730395 has 16 divisors (see below), whose sum is σ = 187172503488. Its totient is φ = 83187778560.

The previous prime is 128897730389. The next prime is 128897730407. The reversal of 128897730395 is 593037798821.

It is not a de Polignac number, because 128897730395 - 2¹⁸ = 128897468251 is a prime.

It is a super-2 number, since 2×128897730395² (a number of 23 digits) contains 22 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, 108316826 + ... + 108318015.

It is an arithmetic number, because the mean of its divisors is an integer number (11698281468).

Almost surely, 2^128897730395 is an apocalyptic number.

128897730395 is a deficient number, since it is larger than the sum of its proper divisors (58274773093).

128897730395 is a wasteful number, since it uses less digits than its factorization.

128897730395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216634870.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 128897730395 in words is "one hundred twenty-eight billion, eight hundred ninety-seven million, seven hundred thirty thousand, three hundred ninety-five".