78645183112081 has 8 divisors (see below), whose sum is σ = 78848362593000. Its totient is φ = 78442008794880.

The previous prime is 78645183112073. The next prime is 78645183112087. The reversal of 78645183112081 is 18021138154687.

It can be written as a sum of positive squares in 4 ways, for example, as 23519250612225 + 55125932499856 = 4849665^2 + 7424684^2 .

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 78645183112081 - 2³ = 78645183112073 is a prime.

It is a super-2 number, since 2×78645183112081² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78645183112087) 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, 30199951 + ... + 32700571.

It is an arithmetic number, because the mean of its divisors is an integer number (9856045324125).

Almost surely, 2^{78645183112081} is an apocalyptic number.

It is an amenable number.

78645183112081 is a deficient number, since it is larger than the sum of its proper divisors (203179480919).

78645183112081 is a wasteful number, since it uses less digits than its factorization.

78645183112081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581859.

The product of its (nonzero) digits is 2580480, while the sum is 55.

The spelling of 78645183112081 in words is "seventy-eight trillion, six hundred forty-five billion, one hundred eighty-three million, one hundred twelve thousand, eighty-one".