16173753981 has 32 divisors (see below), whose sum is σ = 28467790848. Its totient is φ = 7907715840.

The previous prime is 16173753941. The next prime is 16173753983. The reversal of 16173753981 is 18935737161.

It is not a de Polignac number, because 16173753981 - 2⁶ = 16173753917 is a prime.

It is a super-3 number, since 3×16173753981³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16173753983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2055375 + ... + 2063228.

It is an arithmetic number, because the mean of its divisors is an integer number (889618464).

Almost surely, 2^16173753981 is an apocalyptic number.

16173753981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16173753981 is a deficient number, since it is larger than the sum of its proper divisors (12294036867).

16173753981 is a wasteful number, since it uses less digits than its factorization.

16173753981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118641.

The product of its digits is 952560, while the sum is 51.

The spelling of 16173753981 in words is "sixteen billion, one hundred seventy-three million, seven hundred fifty-three thousand, nine hundred eighty-one".