78468176168861 has 2 divisors, whose sum is σ = 78468176168862. Its totient is φ = 78468176168860.

The previous prime is 78468176168839. The next prime is 78468176168881. The reversal of 78468176168861 is 16886167186487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64191038348761 + 14277137820100 = 8011931^2 + 3778510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78468176168861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78468176168881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39234088084430 + 39234088084431.

It is an arithmetic number, because the mean of its divisors is an integer number (39234088084431).

Almost surely, 2^{78468176168861} is an apocalyptic number.

It is an amenable number.

78468176168861 is a deficient number, since it is larger than the sum of its proper divisors (1).

78468176168861 is an equidigital number, since it uses as much as digits as its factorization.

78468176168861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1040449536, while the sum is 77.

The spelling of 78468176168861 in words is "seventy-eight trillion, four hundred sixty-eight billion, one hundred seventy-six million, one hundred sixty-eight thousand, eight hundred sixty-one".