78036842329 has 4 divisors (see below), whose sum is σ = 78217902720. Its totient is φ = 77855781940.

The previous prime is 78036842287. The next prime is 78036842369. The reversal of 78036842329 is 92324863087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92324863087 = 79 ⋅1168669153.

It is a cyclic number.

It is not a de Polignac number, because 78036842329 - 2⁷ = 78036842201 is a prime.

It is a super-2 number, since 2×78036842329² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78036842369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90529549 + ... + 90530410.

It is an arithmetic number, because the mean of its divisors is an integer number (19554475680).

Almost surely, 2^78036842329 is an apocalyptic number.

It is an amenable number.

78036842329 is a deficient number, since it is larger than the sum of its proper divisors (181060391).

78036842329 is a wasteful number, since it uses less digits than its factorization.

78036842329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181060390.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 78036842329 in words is "seventy-eight billion, thirty-six million, eight hundred forty-two thousand, three hundred twenty-nine".