128512739740 has 48 divisors (see below), whose sum is σ = 336469722624. Its totient is φ = 40055918400.

The previous prime is 128512739689. The next prime is 128512739777. The reversal of 128512739740 is 47937215821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41723376 + ... + 41726455.

It is an arithmetic number, because the mean of its divisors is an integer number (7009785888).

Almost surely, 2^128512739740 is an apocalyptic number.

128512739740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128512739740 is an abundant number, since it is smaller than the sum of its proper divisors (207956982884).

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

128512739740 is a wasteful number, since it uses less digits than its factorization.

128512739740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83449858 (or 83449856 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 128512739740 in words is "one hundred twenty-eight billion, five hundred twelve million, seven hundred thirty-nine thousand, seven hundred forty".