163651663103556 has 12 divisors (see below), whose sum is σ = 381853880574992. Its totient is φ = 54550554367848.

The previous prime is 163651663103543. The next prime is 163651663103573. The reversal of 163651663103556 is 655301366156361.

163651663103556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 163651663103496 and 163651663103505.

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, 6818819295970 + ... + 6818819295993.

Almost surely, 2^{163651663103556} is an apocalyptic number.

It is an amenable number.

163651663103556 is an abundant number, since it is smaller than the sum of its proper divisors (218202217471436).

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

163651663103556 is a wasteful number, since it uses less digits than its factorization.

163651663103556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13637638591970 (or 13637638591968 counting only the distinct ones).

The product of its (nonzero) digits is 26244000, while the sum is 57.

The spelling of 163651663103556 in words is "one hundred sixty-three trillion, six hundred fifty-one billion, six hundred sixty-three million, one hundred three thousand, five hundred fifty-six".