81074716 has 12 divisors (see below), whose sum is σ = 141957088. Its totient is φ = 40515552.

The previous prime is 81074713. The next prime is 81074723. The reversal of 81074716 is 61747018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81074711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5245 + ... + 13771.

Almost surely, 2^81074716 is an apocalyptic number.

It is an amenable number.

81074716 is a deficient number, since it is larger than the sum of its proper divisors (60882372).

81074716 is a wasteful number, since it uses less digits than its factorization.

81074716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10908 (or 10906 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 81074716 is about 9004.1499321146. The cubic root of 81074716 is about 432.8078661574.

The spelling of 81074716 in words is "eighty-one million, seventy-four thousand, seven hundred sixteen".