78818433272121 has 8 divisors (see below), whose sum is σ = 105092504798400. Its totient is φ = 52544991963632.

The previous prime is 78818433272063. The next prime is 78818433272177. The reversal of 78818433272121 is 12127233481887.

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 78818433272121 - 2⁷ = 78818433271993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78818433272021) 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, 157262550 + ... + 157762943.

It is an arithmetic number, because the mean of its divisors is an integer number (13136563099800).

Almost surely, 2^{78818433272121} is an apocalyptic number.

It is an amenable number.

78818433272121 is a deficient number, since it is larger than the sum of its proper divisors (26274071526279).

78818433272121 is a wasteful number, since it uses less digits than its factorization.

78818433272121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315108895.

The product of its digits is 7225344, while the sum is 57.

The spelling of 78818433272121 in words is "seventy-eight trillion, eight hundred eighteen billion, four hundred thirty-three million, two hundred seventy-two thousand, one hundred twenty-one".