128432374816 has 24 divisors (see below), whose sum is σ = 253145647440. Its totient is φ = 64141416768.

The previous prime is 128432374801. The next prime is 128432374817. The reversal of 128432374816 is 618473234821.

It is a super-2 number, since 2×128432374816² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128432374816.

It is not an unprimeable number, because it can be changed into a prime (128432374817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2308666 + ... + 2363641.

It is an arithmetic number, because the mean of its divisors is an integer number (10547735310).

Almost surely, 2^128432374816 is an apocalyptic number.

128432374816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128432374816 is a deficient number, since it is larger than the sum of its proper divisors (124713272624).

128432374816 is an equidigital number, since it uses as much as digits as its factorization.

128432374816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4673176 (or 4673168 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 49.

It can be divided in two parts, 1284 and 32374816, that added together give a square (32376100 = 5690²).

The spelling of 128432374816 in words is "one hundred twenty-eight billion, four hundred thirty-two million, three hundred seventy-four thousand, eight hundred sixteen".