3998173501256 has 32 divisors (see below), whose sum is σ = 8192608164000. Its totient is φ = 1814123591040.

The previous prime is 3998173501237. The next prime is 3998173501271. The reversal of 3998173501256 is 6521053718993.

3998173501256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3998173501256² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3998173501195 and 3998173501204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40300181 + ... + 40399268.

It is an arithmetic number, because the mean of its divisors is an integer number (256019005125).

Almost surely, 2^{3998173501256} is an apocalyptic number.

It is an amenable number.

3998173501256 is an abundant number, since it is smaller than the sum of its proper divisors (4194434662744).

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

3998173501256 is a wasteful number, since it uses less digits than its factorization.

3998173501256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80700029 (or 80700025 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 3998173501256 in words is "three trillion, nine hundred ninety-eight billion, one hundred seventy-three million, five hundred one thousand, two hundred fifty-six".