81314678 has 8 divisors (see below), whose sum is σ = 125268672. Its totient is φ = 39558456.

The previous prime is 81314659. The next prime is 81314693. The reversal of 81314678 is 87641318.

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

It is a super-2 number, since 2×81314678² = 13224153716487368, which contains 22 as substring.

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, 549350 + ... + 549497.

It is an arithmetic number, because the mean of its divisors is an integer number (15658584).

Almost surely, 2^81314678 is an apocalyptic number.

81314678 is a deficient number, since it is larger than the sum of its proper divisors (43953994).

81314678 is a wasteful number, since it uses less digits than its factorization.

81314678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098886.

The product of its digits is 32256, while the sum is 38.

The square root of 81314678 is about 9017.4651648897. The cubic root of 81314678 is about 433.2344485741.

The spelling of 81314678 in words is "eighty-one million, three hundred fourteen thousand, six hundred seventy-eight".