78100113869 has 2 divisors, whose sum is σ = 78100113870. Its totient is φ = 78100113868.

The previous prime is 78100113863. The next prime is 78100113877. The reversal of 78100113869 is 96831100187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67125037225 + 10975076644 = 259085^2 + 104762^2 .

It is a cyclic number.

It is not a de Polignac number, because 78100113869 - 2⁴ = 78100113853 is a prime.

It is a super-2 number, since 2×78100113869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78100113863) 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 as a sum of consecutive naturals, namely, 39050056934 + 39050056935.

It is an arithmetic number, because the mean of its divisors is an integer number (39050056935).

Almost surely, 2^78100113869 is an apocalyptic number.

It is an amenable number.

78100113869 is a deficient number, since it is larger than the sum of its proper divisors (1).

78100113869 is an equidigital number, since it uses as much as digits as its factorization.

78100113869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 78100113869 in words is "seventy-eight billion, one hundred million, one hundred thirteen thousand, eight hundred sixty-nine".