78216063687601 has 8 divisors (see below), whose sum is σ = 89989718529600. Its totient is φ = 66592391710128.

The previous prime is 78216063687539. The next prime is 78216063687637. The reversal of 78216063687601 is 10678636061287.

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

It is a cyclic number.

It is not a de Polignac number, because 78216063687601 - 2¹⁹ = 78216063163313 is a prime.

It is a super-2 number, since 2×78216063687601² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78216063687601.

It is not an unprimeable number, because it can be changed into a prime (78216063687691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37495715011 + ... + 37495717096.

It is an arithmetic number, because the mean of its divisors is an integer number (11248714816200).

Almost surely, 2^{78216063687601} is an apocalyptic number.

It is an amenable number.

78216063687601 is a deficient number, since it is larger than the sum of its proper divisors (11773654841999).

78216063687601 is a wasteful number, since it uses less digits than its factorization.

78216063687601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74991432263.

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 78216063687601 in words is "seventy-eight trillion, two hundred sixteen billion, sixty-three million, six hundred eighty-seven thousand, six hundred one".