81848355 has 8 divisors (see below), whose sum is σ = 130957392. Its totient is φ = 43652448.

The previous prime is 81848317. The next prime is 81848357. The reversal of 81848355 is 55384818.

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

It is not a de Polignac number, because 81848355 - 2¹⁶ = 81782819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81848357) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2728264 + ... + 2728293.

It is an arithmetic number, because the mean of its divisors is an integer number (16369674).

Almost surely, 2^81848355 is an apocalyptic number.

81848355 is a deficient number, since it is larger than the sum of its proper divisors (49109037).

81848355 is a wasteful number, since it uses less digits than its factorization.

81848355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456565.

The product of its digits is 153600, while the sum is 42.

The square root of 81848355 is about 9047.0080689695. The cubic root of 81848355 is about 434.1801707569.

The spelling of 81848355 in words is "eighty-one million, eight hundred forty-eight thousand, three hundred fifty-five".