78978101337 has 6 divisors (see below), whose sum is σ = 114079479722. Its totient is φ = 52652067552.

The previous prime is 78978101263. The next prime is 78978101347. The reversal of 78978101337 is 73310187987.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 70358093001 + 8620008336 = 265251^2 + 92844^2 .

It is not a de Polignac number, because 78978101337 - 2¹² = 78978097241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78978101347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4387672288 + ... + 4387672305.

Almost surely, 2^78978101337 is an apocalyptic number.

It is an amenable number.

78978101337 is a deficient number, since it is larger than the sum of its proper divisors (35101378385).

78978101337 is a wasteful number, since it uses less digits than its factorization.

78978101337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8775344599 (or 8775344596 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 78978101337 in words is "seventy-eight billion, nine hundred seventy-eight million, one hundred one thousand, three hundred thirty-seven".