128736425956 has 6 divisors (see below), whose sum is σ = 225288745430. Its totient is φ = 64368212976.

The previous prime is 128736425911. The next prime is 128736426001. The reversal of 128736425956 is 659524637821.

It is an interprime number because it is at equal distance from previous prime (128736425911) and next prime (128736426001).

It can be written as a sum of positive squares in only one way, i.e., 127534694400 + 1201731556 = 357120^2 + 34666^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128736425956.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16092053241 + ... + 16092053248.

Almost surely, 2^128736425956 is an apocalyptic number.

It is an amenable number.

128736425956 is a deficient number, since it is larger than the sum of its proper divisors (96552319474).

128736425956 is a wasteful number, since it uses less digits than its factorization.

128736425956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32184106493 (or 32184106491 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 58.

The spelling of 128736425956 in words is "one hundred twenty-eight billion, seven hundred thirty-six million, four hundred twenty-five thousand, nine hundred fifty-six".