78216063687599 has 8 divisors (see below), whose sum is σ = 80120458220880. Its totient is φ = 76315551713856.

The previous prime is 78216063687539. The next prime is 78216063687637. The reversal of 78216063687599 is 99578636061287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78216063687599 is a prime.

It is a super-2 number, since 2×78216063687599² (a number of 29 digits) 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 (78216063687539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 970599104 + ... + 970679685.

It is an arithmetic number, because the mean of its divisors is an integer number (10015057277610).

Almost surely, 2^{78216063687599} is an apocalyptic number.

78216063687599 is a deficient number, since it is larger than the sum of its proper divisors (1904394533281).

78216063687599 is a wasteful number, since it uses less digits than its factorization.

78216063687599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941279769.

The product of its (nonzero) digits is 1646023680, while the sum is 77.

The spelling of 78216063687599 in words is "seventy-eight trillion, two hundred sixteen billion, sixty-three million, six hundred eighty-seven thousand, five hundred ninety-nine".