71718544 has 10 divisors (see below), whose sum is σ = 138954710. Its totient is φ = 35859264.

The previous prime is 71718527. The next prime is 71718547. The reversal of 71718544 is 44581717.

It can be written as a sum of positive squares in only one way, i.e., 68690944 + 3027600 = 8288^2 + 1740^2 .

It is not an unprimeable number, because it can be changed into a prime (71718547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2241189 + ... + 2241220.

It is an arithmetic number, because the mean of its divisors is an integer number (13895471).

Almost surely, 2^71718544 is an apocalyptic number.

It is an amenable number.

71718544 is a deficient number, since it is larger than the sum of its proper divisors (67236166).

71718544 is a wasteful number, since it uses less digits than its factorization.

71718544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482417 (or 4482411 counting only the distinct ones).

The product of its digits is 31360, while the sum is 37.

The square root of 71718544 is about 8468.6801805240. The cubic root of 71718544 is about 415.4739714629.

The spelling of 71718544 in words is "seventy-one million, seven hundred eighteen thousand, five hundred forty-four".