163254663481 has 16 divisors (see below), whose sum is σ = 209664854784. Its totient is φ = 123552500544.

The previous prime is 163254663479. The next prime is 163254663491. The reversal of 163254663481 is 184366452361.

It is a cyclic number.

It is not a de Polignac number, because 163254663481 - 2¹ = 163254663479 is a prime.

It is a super-2 number, since 2×163254663481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163254663421) 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, 38998066 + ... + 39002251.

It is an arithmetic number, because the mean of its divisors is an integer number (13104053424).

Almost surely, 2^163254663481 is an apocalyptic number.

It is an amenable number.

163254663481 is a deficient number, since it is larger than the sum of its proper divisors (46410191303).

163254663481 is a wasteful number, since it uses less digits than its factorization.

163254663481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78000360.

The product of its digits is 2488320, while the sum is 49.

The spelling of 163254663481 in words is "one hundred sixty-three billion, two hundred fifty-four million, six hundred sixty-three thousand, four hundred eighty-one".