81363678 has 32 divisors (see below), whose sum is σ = 177845760. Its totient is φ = 24610560.

The previous prime is 81363677. The next prime is 81363713. The reversal of 81363678 is 87636318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81363677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60651 + ... + 61977.

It is an arithmetic number, because the mean of its divisors is an integer number (5557680).

Almost surely, 2^81363678 is an apocalyptic number.

81363678 is an abundant number, since it is smaller than the sum of its proper divisors (96482082).

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

81363678 is a wasteful number, since it uses less digits than its factorization.

81363678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272.

The product of its digits is 145152, while the sum is 42.

The square root of 81363678 is about 9020.1817054869. The cubic root of 81363678 is about 433.3214530602.

The spelling of 81363678 in words is "eighty-one million, three hundred sixty-three thousand, six hundred seventy-eight".