71018816 has 56 divisors (see below), whose sum is σ = 154716480. Its totient is φ = 32076800.

The previous prime is 71018797. The next prime is 71018819. The reversal of 71018816 is 61881017.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71018819) 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 7 ways as a sum of consecutive naturals, for example, 197645 + ... + 198003.

Almost surely, 2^71018816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71018816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77358240).

71018816 is an abundant number, since it is smaller than the sum of its proper divisors (83697664).

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

71018816 is a wasteful number, since it uses less digits than its factorization.

71018816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 71018816 is about 8427.2662233965. The cubic root of 71018816 is about 414.1183508789.

The spelling of 71018816 in words is "seventy-one million, eighteen thousand, eight hundred sixteen".