71993372616 has 64 divisors (see below), whose sum is σ = 218161742400. Its totient is φ = 21816172800.

The previous prime is 71993372609. The next prime is 71993372621. The reversal of 71993372616 is 61627339917.

It is a happy number.

71993372616 is a `hidden beast` number, since 7 + 19 + 9 + 3 + 3 + 7 + 2 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15147745 + ... + 15152496.

It is an arithmetic number, because the mean of its divisors is an integer number (3408777225).

Almost surely, 2^71993372616 is an apocalyptic number.

It is an amenable number.

71993372616 is an abundant number, since it is smaller than the sum of its proper divisors (146168369784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71993372616 is a wasteful number, since it uses less digits than its factorization.

71993372616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30300267 (or 30300257 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The spelling of 71993372616 in words is "seventy-one billion, nine hundred ninety-three million, three hundred seventy-two thousand, six hundred sixteen".