163501631445601 has 4 divisors (see below), whose sum is σ = 164480683131072. Its totient is φ = 162522579760132.

The previous prime is 163501631445541. The next prime is 163501631445617. The reversal of 163501631445601 is 106544136105361.

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.

It is a cyclic number.

It is not a de Polignac number, because 163501631445601 - 2¹⁷ = 163501631314529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163501631445671) 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, 489525842485 + ... + 489525842818.

It is an arithmetic number, because the mean of its divisors is an integer number (41120170782768).

Almost surely, 2^{163501631445601} is an apocalyptic number.

It is an amenable number.

163501631445601 is a deficient number, since it is larger than the sum of its proper divisors (979051685471).

163501631445601 is an equidigital number, since it uses as much as digits as its factorization.

163501631445601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979051685470.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 163501631445601 in words is "one hundred sixty-three trillion, five hundred one billion, six hundred thirty-one million, four hundred forty-five thousand, six hundred one".