72816116 has 6 divisors (see below), whose sum is σ = 127428210. Its totient is φ = 36408056.

The previous prime is 72816101. The next prime is 72816131. The reversal of 72816116 is 61161827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72816101) and next prime (72816131).

It can be written as a sum of positive squares in only one way, i.e., 63840100 + 8976016 = 7990^2 + 2996^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9102011 + ... + 9102018.

It is an arithmetic number, because the mean of its divisors is an integer number (21238035).

Almost surely, 2^72816116 is an apocalyptic number.

It is an amenable number.

72816116 is a deficient number, since it is larger than the sum of its proper divisors (54612094).

72816116 is a wasteful number, since it uses less digits than its factorization.

72816116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18204033 (or 18204031 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 72816116 is about 8533.2359629861. The cubic root of 72816116 is about 417.5827051185.

The spelling of 72816116 in words is "seventy-two million, eight hundred sixteen thousand, one hundred sixteen".