78365071369 has 8 divisors (see below), whose sum is σ = 84399629832. Its totient is φ = 72331438080.

The previous prime is 78365071363. The next prime is 78365071423. The reversal of 78365071369 is 96317056387.

It can be written as a sum of positive squares in 4 ways, for example, as 19512737344 + 58852334025 = 139688^2 + 242595^2 .

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 78365071369 - 2⁹ = 78365070857 is a prime.

It is a super-2 number, since 2×78365071369² (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 (78365071363) 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, 50104 + ... + 399049.

It is an arithmetic number, because the mean of its divisors is an integer number (10549953729).

Almost surely, 2^78365071369 is an apocalyptic number.

It is an amenable number.

78365071369 is a deficient number, since it is larger than the sum of its proper divisors (6034558463).

78365071369 is a wasteful number, since it uses less digits than its factorization.

78365071369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462587.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 78365071369 in words is "seventy-eight billion, three hundred sixty-five million, seventy-one thousand, three hundred sixty-nine".