78362149867 has 2 divisors, whose sum is σ = 78362149868. Its totient is φ = 78362149866.

The previous prime is 78362149847. The next prime is 78362149907. The reversal of 78362149867 is 76894126387.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78362149867 - 2⁷ = 78362149739 is a prime.

It is a super-2 number, since 2×78362149867² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78362149847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39181074933 + 39181074934.

It is an arithmetic number, because the mean of its divisors is an integer number (39181074934).

Almost surely, 2^78362149867 is an apocalyptic number.

78362149867 is a deficient number, since it is larger than the sum of its proper divisors (1).

78362149867 is an equidigital number, since it uses as much as digits as its factorization.

78362149867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 61.

The spelling of 78362149867 in words is "seventy-eight billion, three hundred sixty-two million, one hundred forty-nine thousand, eight hundred sixty-seven".