81198446 has 16 divisors (see below), whose sum is σ = 139345920. Its totient is φ = 34762200.

The previous prime is 81198437. The next prime is 81198451. The reversal of 81198446 is 64489118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13595 + ... + 18633.

It is an arithmetic number, because the mean of its divisors is an integer number (8709120).

Almost surely, 2^81198446 is an apocalyptic number.

81198446 is a deficient number, since it is larger than the sum of its proper divisors (58147474).

81198446 is a wasteful number, since it uses less digits than its factorization.

81198446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199.

The product of its digits is 55296, while the sum is 41.

The square root of 81198446 is about 9011.0180334965. The cubic root of 81198446 is about 433.0279269484.

The spelling of 81198446 in words is "eighty-one million, one hundred ninety-eight thousand, four hundred forty-six".