128435701540664 has 96 divisors (see below), whose sum is σ = 281139831453600. Its totient is φ = 55006819338240.

The previous prime is 128435701540651. The next prime is 128435701540733. The reversal of 128435701540664 is 466045107534821.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199884224 + ... + 200525744.

It is an arithmetic number, because the mean of its divisors is an integer number (2928539910975).

Almost surely, 2^{128435701540664} is an apocalyptic number.

128435701540664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128435701540664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140569915726800).

128435701540664 is an abundant number, since it is smaller than the sum of its proper divisors (152704129912936).

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

128435701540664 is an frugal number, since it uses more digits than its factorization.

128435701540664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643051 (or 643019 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 56.

The spelling of 128435701540664 in words is "one hundred twenty-eight trillion, four hundred thirty-five billion, seven hundred one million, five hundred forty thousand, six hundred sixty-four".