163405623163431 has 16 divisors (see below), whose sum is σ = 238605734861568. Its totient is φ = 98648365824000.

The previous prime is 163405623163429. The next prime is 163405623163457. The reversal of 163405623163431 is 134361326504361.

It is a happy number.

It is not a de Polignac number, because 163405623163431 - 2¹ = 163405623163429 is a prime.

It is a super-2 number, since 2×163405623163431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163405623163931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9633620995 + ... + 9633637956.

It is an arithmetic number, because the mean of its divisors is an integer number (14912858428848).

Almost surely, 2^{163405623163431} is an apocalyptic number.

163405623163431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

163405623163431 is a deficient number, since it is larger than the sum of its proper divisors (75200111698137).

163405623163431 is a wasteful number, since it uses less digits than its factorization.

163405623163431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19267259222.

The product of its (nonzero) digits is 2799360, while the sum is 48.

Adding to 163405623163431 its reverse (134361326504361), we get a palindrome (297766949667792).

The spelling of 163405623163431 in words is "one hundred sixty-three trillion, four hundred five billion, six hundred twenty-three million, one hundred sixty-three thousand, four hundred thirty-one".