162171616506651 has 8 divisors (see below), whose sum is σ = 240254246676560. Its totient is φ = 108114411004416.

The previous prime is 162171616506649. The next prime is 162171616506707. The reversal of 162171616506651 is 156605616171261.

162171616506651 is a `hidden beast` number, since 1 + 6 + 2 + 1 + 71 + 6 + 1 + 6 + 506 + 65 + 1 = 666.

162171616506651 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 162171616506651 - 2¹ = 162171616506649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162171616506751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3003178083430 + ... + 3003178083483.

It is an arithmetic number, because the mean of its divisors is an integer number (30031780834570).

Almost surely, 2^{162171616506651} is an apocalyptic number.

162171616506651 is a deficient number, since it is larger than the sum of its proper divisors (78082630169909).

162171616506651 is an equidigital number, since it uses as much as digits as its factorization.

162171616506651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6006356166922 (or 6006356166916 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 162171616506651 in words is "one hundred sixty-two trillion, one hundred seventy-one billion, six hundred sixteen million, five hundred six thousand, six hundred fifty-one".