78533170844231 has 4 divisors (see below), whose sum is σ = 81241211218200. Its totient is φ = 75825130470264.

The previous prime is 78533170844179. The next prime is 78533170844257. The reversal of 78533170844231 is 13244807133587.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78533170844231 is a prime.

It is a super-2 number, since 2×78533170844231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78533170844131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354020186941 + ... + 1354020186998.

It is an arithmetic number, because the mean of its divisors is an integer number (20310302804550).

Almost surely, 2^{78533170844231} is an apocalyptic number.

78533170844231 is a deficient number, since it is larger than the sum of its proper divisors (2708040373969).

78533170844231 is a wasteful number, since it uses less digits than its factorization.

78533170844231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708040373968.

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 78533170844231 in words is "seventy-eight trillion, five hundred thirty-three billion, one hundred seventy million, eight hundred forty-four thousand, two hundred thirty-one".