78864967554013 has 2 divisors, whose sum is σ = 78864967554014. Its totient is φ = 78864967554012.

The previous prime is 78864967553987. The next prime is 78864967554029. The reversal of 78864967554013 is 31045576946887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72492589290564 + 6372378263449 = 8514258^2 + 2524357^2 .

It is a cyclic number.

It is not a de Polignac number, because 78864967554013 - 2³⁷ = 78727528600541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78864967554073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39432483777006 + 39432483777007.

It is an arithmetic number, because the mean of its divisors is an integer number (39432483777007).

Almost surely, 2^{78864967554013} is an apocalyptic number.

It is an amenable number.

78864967554013 is a deficient number, since it is larger than the sum of its proper divisors (1).

78864967554013 is an equidigital number, since it uses as much as digits as its factorization.

78864967554013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1219276800, while the sum is 73.

The spelling of 78864967554013 in words is "seventy-eight trillion, eight hundred sixty-four billion, nine hundred sixty-seven million, five hundred fifty-four thousand, thirteen".