78302814907 has 4 divisors (see below), whose sum is σ = 78330773016. Its totient is φ = 78274856800.

The previous prime is 78302814859. The next prime is 78302814911. The reversal of 78302814907 is 70941820387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70941820387 = 71347 ⋅994321.

It is a cyclic number.

It is not a de Polignac number, because 78302814907 - 2¹⁵ = 78302782139 is a prime.

It is a super-2 number, since 2×78302814907² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78302814917) 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, 13974853 + ... + 13980454.

It is an arithmetic number, because the mean of its divisors is an integer number (19582693254).

Almost surely, 2^78302814907 is an apocalyptic number.

78302814907 is a deficient number, since it is larger than the sum of its proper divisors (27958109).

78302814907 is a wasteful number, since it uses less digits than its factorization.

78302814907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27958108.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 78302814907 in words is "seventy-eight billion, three hundred two million, eight hundred fourteen thousand, nine hundred seven".