78026868046357 has 2 divisors, whose sum is σ = 78026868046358. Its totient is φ = 78026868046356.

The previous prime is 78026868046321. The next prime is 78026868046427. The reversal of 78026868046357 is 75364086862087.

It is an a-pointer prime, because the next prime (78026868046427) can be obtained adding 78026868046357 to its sum of digits (70).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61439119332721 + 16587748713636 = 7838311^2 + 4072806^2 .

It is an emirp because it is prime and its reverse (75364086862087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78026868046357 - 2²³ = 78026859657749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78026868046657) 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, 39013434023178 + 39013434023179.

It is an arithmetic number, because the mean of its divisors is an integer number (39013434023179).

Almost surely, 2^{78026868046357} is an apocalyptic number.

It is an amenable number.

78026868046357 is a deficient number, since it is larger than the sum of its proper divisors (1).

78026868046357 is an equidigital number, since it uses as much as digits as its factorization.

78026868046357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 650280960, while the sum is 70.

The spelling of 78026868046357 in words is "seventy-eight trillion, twenty-six billion, eight hundred sixty-eight million, forty-six thousand, three hundred fifty-seven".