81167448 has 48 divisors (see below), whose sum is σ = 205904520. Its totient is φ = 26661376.

The previous prime is 81167417. The next prime is 81167477. The reversal of 81167448 is 84476118.

It is a super-2 number, since 2×81167448² = 13176309229665408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 469090 + ... + 469262.

Almost surely, 2^81167448 is an apocalyptic number.

It is an amenable number.

81167448 is an abundant number, since it is smaller than the sum of its proper divisors (124737072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81167448 is a wasteful number, since it uses less digits than its factorization.

81167448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 291 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 81167448 is about 9009.2978638737. The cubic root of 81167448 is about 432.9728162543.

The spelling of 81167448 in words is "eighty-one million, one hundred sixty-seven thousand, four hundred forty-eight".