163542420331125 has 128 divisors (see below), whose sum is σ = 299349613854720. Its totient is φ = 78632946080000.

The previous prime is 163542420331067. The next prime is 163542420331127. The reversal of 163542420331125 is 521133024245361.

It is not a de Polignac number, because 163542420331125 - 2¹⁹ = 163542419806837 is a prime.

It is a super-2 number, since 2×163542420331125² (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 (163542420331127) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 777494467 + ... + 777704783.

It is an arithmetic number, because the mean of its divisors is an integer number (2338668858240).

Almost surely, 2^{163542420331125} is an apocalyptic number.

163542420331125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163542420331125 is a deficient number, since it is larger than the sum of its proper divisors (135807193523595).

163542420331125 is a wasteful number, since it uses less digits than its factorization.

163542420331125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211916 (or 211906 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 163542420331125 its reverse (521133024245361), we get a palindrome (684675444576486).

The spelling of 163542420331125 in words is "one hundred sixty-three trillion, five hundred forty-two billion, four hundred twenty million, three hundred thirty-one thousand, one hundred twenty-five".