71678481 has 16 divisors (see below), whose sum is σ = 110722944. Its totient is φ = 40397184.

The previous prime is 71678473. The next prime is 71678491. The reversal of 71678481 is 18487617.

It is a happy number.

It is not a de Polignac number, because 71678481 - 2³ = 71678473 is a prime.

It is a super-2 number, since 2×71678481² = 10275609276934722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71678471) 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 15 ways as a sum of consecutive naturals, for example, 21846 + ... + 24911.

It is an arithmetic number, because the mean of its divisors is an integer number (6920184).

Almost surely, 2^71678481 is an apocalyptic number.

It is an amenable number.

71678481 is a deficient number, since it is larger than the sum of its proper divisors (39044463).

71678481 is a wasteful number, since it uses less digits than its factorization.

71678481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46840.

The product of its digits is 75264, while the sum is 42.

The square root of 71678481 is about 8466.3144874260. The cubic root of 71678481 is about 415.3965938273.

It can be divided in two parts, 716 and 78481, that added together give a palindrome (79197).

The spelling of 71678481 in words is "seventy-one million, six hundred seventy-eight thousand, four hundred eighty-one".