128855007628 has 12 divisors (see below), whose sum is σ = 235300448880. Its totient is φ = 61626307952.

The previous prime is 128855007587. The next prime is 128855007647. The reversal of 128855007628 is 826700558821.

It is a super-2 number, since 2×128855007628² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700298863 + ... + 700299046.

It is an arithmetic number, because the mean of its divisors is an integer number (19608370740).

Almost surely, 2^128855007628 is an apocalyptic number.

It is an amenable number.

128855007628 is a deficient number, since it is larger than the sum of its proper divisors (106445441252).

128855007628 is a wasteful number, since it uses less digits than its factorization.

128855007628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400597936 (or 1400597934 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 52.

The spelling of 128855007628 in words is "one hundred twenty-eight billion, eight hundred fifty-five million, seven thousand, six hundred twenty-eight".