16167252581 has 8 divisors (see below), whose sum is σ = 16203102720. Its totient is φ = 16131433968.

The previous prime is 16167252539. The next prime is 16167252623. The reversal of 16167252581 is 18525276161.

16167252581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16167252539) and next prime (16167252623).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16167252581 - 2²² = 16163058277 is a prime.

It is a super-2 number, since 2×16167252581² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16167255581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1225040 + ... + 1238166.

It is an arithmetic number, because the mean of its divisors is an integer number (2025387840).

Almost surely, 2^16167252581 is an apocalyptic number.

It is an amenable number.

16167252581 is a deficient number, since it is larger than the sum of its proper divisors (35850139).

16167252581 is a wasteful number, since it uses less digits than its factorization.

16167252581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15763.

The product of its digits is 201600, while the sum is 44.

The spelling of 16167252581 in words is "sixteen billion, one hundred sixty-seven million, two hundred fifty-two thousand, five hundred eighty-one".