78468417187793 has 2 divisors, whose sum is σ = 78468417187794. Its totient is φ = 78468417187792.

The previous prime is 78468417187759. The next prime is 78468417187819. The reversal of 78468417187793 is 39778171486487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66826243271824 + 11642173915969 = 8174732^2 + 3412063^2 .

It is a cyclic number.

It is not a de Polignac number, because 78468417187793 - 2¹⁶ = 78468417122257 is a prime.

It is not a weakly prime, because it can be changed into another prime (78468417187393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39234208593896 + 39234208593897.

It is an arithmetic number, because the mean of its divisors is an integer number (39234208593897).

Almost surely, 2^{78468417187793} is an apocalyptic number.

It is an amenable number.

78468417187793 is a deficient number, since it is larger than the sum of its proper divisors (1).

78468417187793 is an equidigital number, since it uses as much as digits as its factorization.

78468417187793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3186376704, while the sum is 80.

The spelling of 78468417187793 in words is "seventy-eight trillion, four hundred sixty-eight billion, four hundred seventeen million, one hundred eighty-seven thousand, seven hundred ninety-three".