81481046 has 8 divisors (see below), whose sum is σ = 122608080. Its totient is φ = 40611688.

The previous prime is 81481027. The next prime is 81481069. The reversal of 81481046 is 64018418.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63626 + ... + 64893.

It is an arithmetic number, because the mean of its divisors is an integer number (15326010).

Almost surely, 2^81481046 is an apocalyptic number.

81481046 is a deficient number, since it is larger than the sum of its proper divisors (41127034).

81481046 is a wasteful number, since it uses less digits than its factorization.

81481046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128838.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 81481046 is about 9026.6852166230. The cubic root of 81481046 is about 433.5297099413.

The spelling of 81481046 in words is "eighty-one million, four hundred eighty-one thousand, forty-six".