78276522613 has 8 divisors (see below), whose sum is σ = 80063776728. Its totient is φ = 76500762624.

The previous prime is 78276522607. The next prime is 78276522671. The reversal of 78276522613 is 31622567287.

It can be written as a sum of positive squares in 4 ways, for example, as 39435207889 + 38841314724 = 198583^2 + 197082^2 .

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 78276522613 - 2¹⁷ = 78276391541 is a prime.

It is a super-2 number, since 2×78276522613² (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 (78276522413) 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, 2859756 + ... + 2886997.

It is an arithmetic number, because the mean of its divisors is an integer number (10007972091).

Almost surely, 2^78276522613 is an apocalyptic number.

It is an amenable number.

78276522613 is a deficient number, since it is larger than the sum of its proper divisors (1787254115).

78276522613 is a wasteful number, since it uses less digits than its factorization.

78276522613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5747063.

The product of its digits is 1693440, while the sum is 49.

The spelling of 78276522613 in words is "seventy-eight billion, two hundred seventy-six million, five hundred twenty-two thousand, six hundred thirteen".