81016814 has 8 divisors (see below), whose sum is σ = 124111008. Its totient is φ = 39646480.

The previous prime is 81016799. The next prime is 81016823. The reversal of 81016814 is 41861018.

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, 430847 + ... + 431034.

It is an arithmetic number, because the mean of its divisors is an integer number (15513876).

Almost surely, 2^81016814 is an apocalyptic number.

81016814 is a deficient number, since it is larger than the sum of its proper divisors (43094194).

81016814 is a wasteful number, since it uses less digits than its factorization.

81016814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861930.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 81016814 is about 9000.9340626404. The cubic root of 81016814 is about 432.7048072731.

The spelling of 81016814 in words is "eighty-one million, sixteen thousand, eight hundred fourteen".