78218376066105 has 128 divisors (see below), whose sum is σ = 148606717464576. Its totient is φ = 34699604582400.

The previous prime is 78218376066031. The next prime is 78218376066119. The reversal of 78218376066105 is 50166067381287.

It is not a de Polignac number, because 78218376066105 - 2²⁴ = 78218359288889 is a prime.

It is a super-2 number, since 2×78218376066105² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 31344772 + ... + 33748058.

It is an arithmetic number, because the mean of its divisors is an integer number (1160989980192).

Almost surely, 2^{78218376066105} is an apocalyptic number.

It is an amenable number.

78218376066105 is a deficient number, since it is larger than the sum of its proper divisors (70388341398471).

78218376066105 is a wasteful number, since it uses less digits than its factorization.

78218376066105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403647.

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 78218376066105 in words is "seventy-eight trillion, two hundred eighteen billion, three hundred seventy-six million, sixty-six thousand, one hundred five".