71955916 has 12 divisors (see below), whose sum is σ = 126040320. Its totient is φ = 35944400.

The previous prime is 71955913. The next prime is 71955941. The reversal of 71955916 is 61955917.

It is not an unprimeable number, because it can be changed into a prime (71955911) 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, 3211 + ... + 12418.

It is an arithmetic number, because the mean of its divisors is an integer number (10503360).

Almost surely, 2^71955916 is an apocalyptic number.

It is an amenable number.

71955916 is a deficient number, since it is larger than the sum of its proper divisors (54084404).

71955916 is a wasteful number, since it uses less digits than its factorization.

71955916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16784 (or 16782 counting only the distinct ones).

The product of its digits is 85050, while the sum is 43.

The square root of 71955916 is about 8482.6833018804. The cubic root of 71955916 is about 415.9318413358.

Subtracting from 71955916 its reverse (61955917), we obtain a palindrome (9999999).

The spelling of 71955916 in words is "seventy-one million, nine hundred fifty-five thousand, nine hundred sixteen".