78216325405207 has 32 divisors (see below), whose sum is σ = 89767386086400. Its totient is φ = 67518216366720.

The previous prime is 78216325405199. The next prime is 78216325405243. The reversal of 78216325405207 is 70250452361287.

It is a cyclic number.

It is not a de Polignac number, because 78216325405207 - 2³ = 78216325405199 is a prime.

It is a super-2 number, since 2×78216325405207² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78216325403207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8494108 + ... + 15118945.

It is an arithmetic number, because the mean of its divisors is an integer number (2805230815200).

Almost surely, 2^{78216325405207} is an apocalyptic number.

78216325405207 is a deficient number, since it is larger than the sum of its proper divisors (11551060681193).

78216325405207 is a wasteful number, since it uses less digits than its factorization.

78216325405207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23613303.

The product of its (nonzero) digits is 5644800, while the sum is 52.

The spelling of 78216325405207 in words is "seventy-eight trillion, two hundred sixteen billion, three hundred twenty-five million, four hundred five thousand, two hundred seven".