128670955385656 has 128 divisors (see below), whose sum is σ = 264114611832960. Its totient is φ = 58525079961600.

The previous prime is 128670955385617. The next prime is 128670955385689. The reversal of 128670955385656 is 656583559076821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1437185965 + ... + 1437275491.

It is an arithmetic number, because the mean of its divisors is an integer number (2063395404945).

Almost surely, 2^{128670955385656} is an apocalyptic number.

It is an amenable number.

128670955385656 is an abundant number, since it is smaller than the sum of its proper divisors (135443656447304).

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

128670955385656 is a wasteful number, since it uses less digits than its factorization.

128670955385656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91985 (or 91981 counting only the distinct ones).

The product of its (nonzero) digits is 3265920000, while the sum is 76.

The spelling of 128670955385656 in words is "one hundred twenty-eight trillion, six hundred seventy billion, nine hundred fifty-five million, three hundred eighty-five thousand, six hundred fifty-six".