72516799 has 4 divisors (see below), whose sum is σ = 72582160. Its totient is φ = 72451440.

The previous prime is 72516793. The next prime is 72516833. The reversal of 72516799 is 99761527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99761527 = 1453 ⋅68659.

It is a cyclic number.

It is not a de Polignac number, because 72516799 - 2⁵ = 72516767 is a prime.

It is a super-2 number, since 2×72516799² = 10517372274412802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72516793) by changing a digit.

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, 30987 + ... + 33244.

It is an arithmetic number, because the mean of its divisors is an integer number (18145540).

Almost surely, 2^72516799 is an apocalyptic number.

72516799 is a deficient number, since it is larger than the sum of its proper divisors (65361).

72516799 is a wasteful number, since it uses less digits than its factorization.

72516799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65360.

The product of its digits is 238140, while the sum is 46.

The square root of 72516799 is about 8515.6795970727. The cubic root of 72516799 is about 417.0097492866.

The spelling of 72516799 in words is "seventy-two million, five hundred sixteen thousand, seven hundred ninety-nine".