71772116 has 12 divisors (see below), whose sum is σ = 135262932. Its totient is φ = 33125568.

The previous prime is 71772109. The next prime is 71772137. The reversal of 71772116 is 61127717.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17808400 + 53963716 = 4220^2 + 7346^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690065 + ... + 690168.

It is an arithmetic number, because the mean of its divisors is an integer number (11271911).

Almost surely, 2^71772116 is an apocalyptic number.

It is an amenable number.

71772116 is a deficient number, since it is larger than the sum of its proper divisors (63490816).

71772116 is a wasteful number, since it uses less digits than its factorization.

71772116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380250 (or 1380248 counting only the distinct ones).

The product of its digits is 4116, while the sum is 32.

The square root of 71772116 is about 8471.8425386689. The cubic root of 71772116 is about 415.5773953504.

The spelling of 71772116 in words is "seventy-one million, seven hundred seventy-two thousand, one hundred sixteen".