78209312047 has 8 divisors (see below), whose sum is σ = 79609655840. Its totient is φ = 76817859840.

The previous prime is 78209312021. The next prime is 78209312057. The reversal of 78209312047 is 74021390287.

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 78209312047 - 2¹⁵ = 78209279279 is a prime.

It is a super-2 number, since 2×78209312047² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78209311994 and 78209312012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78209312017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2205147 + ... + 2240332.

It is an arithmetic number, because the mean of its divisors is an integer number (9951206980).

Almost surely, 2^78209312047 is an apocalyptic number.

78209312047 is a deficient number, since it is larger than the sum of its proper divisors (1400343793).

78209312047 is a wasteful number, since it uses less digits than its factorization.

78209312047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445793.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 78209312047 in words is "seventy-eight billion, two hundred nine million, three hundred twelve thousand, forty-seven".