81049148 has 18 divisors (see below), whose sum is σ = 148274784. Its totient is φ = 38761624.

The previous prime is 81049147. The next prime is 81049151. The reversal of 81049148 is 84194018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81049141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17036 + ... + 21267.

It is an arithmetic number, because the mean of its divisors is an integer number (8237488).

Almost surely, 2^81049148 is an apocalyptic number.

It is an amenable number.

81049148 is a deficient number, since it is larger than the sum of its proper divisors (67225636).

81049148 is a wasteful number, since it uses less digits than its factorization.

81049148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38353 (or 38328 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 81049148 is about 9002.7300303852. The cubic root of 81049148 is about 432.7623641171.

The spelling of 81049148 in words is "eighty-one million, forty-nine thousand, one hundred forty-eight".