81073548 has 42 divisors (see below), whose sum is σ = 212728404. Its totient is φ = 27023544.

The previous prime is 81073547. The next prime is 81073607. The reversal of 81073548 is 84537018.

81073548 is a `hidden beast` number, since 8 + 107 + 3 + 548 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (81073547) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 10986 + ... + 16817.

It is an arithmetic number, because the mean of its divisors is an integer number (5064962).

Almost surely, 2^81073548 is an apocalyptic number.

It is an amenable number.

81073548 is an abundant number, since it is smaller than the sum of its proper divisors (131654856).

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

81073548 is a wasteful number, since it uses less digits than its factorization.

81073548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27825 (or 27808 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 81073548 is about 9004.0850728989. The cubic root of 81073548 is about 432.8057877371.

The spelling of 81073548 in words is "eighty-one million, seventy-three thousand, five hundred forty-eight".