128009693424 has 40 divisors (see below), whose sum is σ = 330813667840. Its totient is φ = 42654161088.

The previous prime is 128009693423. The next prime is 128009693431. The reversal of 128009693424 is 424396900821.

It is a super-2 number, since 2×128009693424² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128009693423) 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, 359902 + ... + 620925.

It is an arithmetic number, because the mean of its divisors is an integer number (8270341696).

Almost surely, 2^128009693424 is an apocalyptic number.

It is an amenable number.

128009693424 is an abundant number, since it is smaller than the sum of its proper divisors (202803974416).

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

128009693424 is a wasteful number, since it uses less digits than its factorization.

128009693424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983557 (or 983551 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 128009693424 in words is "one hundred twenty-eight billion, nine million, six hundred ninety-three thousand, four hundred twenty-four".