163667637201 has 4 divisors (see below), whose sum is σ = 218223516272. Its totient is φ = 109111758132.

The previous prime is 163667637193. The next prime is 163667637227. The reversal of 163667637201 is 102736766361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102736766361 = 3 ⋅34245588787.

It is not a de Polignac number, because 163667637201 - 2³ = 163667637193 is a prime.

It is a super-2 number, since 2×163667637201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163667637101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27277939531 + ... + 27277939536.

It is an arithmetic number, because the mean of its divisors is an integer number (54555879068).

Almost surely, 2^163667637201 is an apocalyptic number.

It is an amenable number.

163667637201 is a deficient number, since it is larger than the sum of its proper divisors (54555879071).

163667637201 is an equidigital number, since it uses as much as digits as its factorization.

163667637201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54555879070.

The product of its (nonzero) digits is 1143072, while the sum is 48.

It can be divided in two parts, 16366 and 7637201, that added together give a palindrome (7653567).

The spelling of 163667637201 in words is "one hundred sixty-three billion, six hundred sixty-seven million, six hundred thirty-seven thousand, two hundred one".