128529694740 has 48 divisors (see below), whose sum is σ = 366673402368. Its totient is φ = 33627894144.

The previous prime is 128529694691. The next prime is 128529694753. The reversal of 128529694740 is 47496925821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20205892 + ... + 20212251.

It is an arithmetic number, because the mean of its divisors is an integer number (7639029216).

Almost surely, 2^128529694740 is an apocalyptic number.

128529694740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128529694740 is an abundant number, since it is smaller than the sum of its proper divisors (238143707628).

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

128529694740 is a wasteful number, since it uses less digits than its factorization.

128529694740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40418208 (or 40418206 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 128529694740 in words is "one hundred twenty-eight billion, five hundred twenty-nine million, six hundred ninety-four thousand, seven hundred forty".