78320727367 has 4 divisors (see below), whose sum is σ = 78474599640. Its totient is φ = 78166855096.

The previous prime is 78320727361. The next prime is 78320727371. The reversal of 78320727367 is 76372702387.

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-78320727367 is a prime.

It is a super-2 number, since 2×78320727367² (a number of 23 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 (78320727361) 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 3 ways as a sum of consecutive naturals, for example, 76935373 + ... + 76936390.

It is an arithmetic number, because the mean of its divisors is an integer number (19618649910).

Almost surely, 2^78320727367 is an apocalyptic number.

78320727367 is a deficient number, since it is larger than the sum of its proper divisors (153872273).

78320727367 is a wasteful number, since it uses less digits than its factorization.

78320727367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153872272.

The product of its (nonzero) digits is 4148928, while the sum is 52.

The spelling of 78320727367 in words is "seventy-eight billion, three hundred twenty million, seven hundred twenty-seven thousand, three hundred sixty-seven".