128155673672 has 64 divisors (see below), whose sum is σ = 271950866880. Its totient is φ = 56211708672.

The previous prime is 128155673627. The next prime is 128155673749. The reversal of 128155673672 is 276376551821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221798 + ... + 552725.

It is an arithmetic number, because the mean of its divisors is an integer number (4249232295).

Almost surely, 2^128155673672 is an apocalyptic number.

It is an amenable number.

128155673672 is an abundant number, since it is smaller than the sum of its proper divisors (143795193208).

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

128155673672 is a wasteful number, since it uses less digits than its factorization.

128155673672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774622 (or 774618 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 53.

The spelling of 128155673672 in words is "one hundred twenty-eight billion, one hundred fifty-five million, six hundred seventy-three thousand, six hundred seventy-two".