78180574052813 has 2 divisors, whose sum is σ = 78180574052814. Its totient is φ = 78180574052812.

The previous prime is 78180574052783. The next prime is 78180574052881. The reversal of 78180574052813 is 31825047508187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74769951829444 + 3410622223369 = 8646962^2 + 1846787^2 .

It is an emirp because it is prime and its reverse (31825047508187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78180574052813 - 2²⁸ = 78180305617357 is a prime.

It is a super-2 number, since 2×78180574052813² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78180574054813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39090287026406 + 39090287026407.

It is an arithmetic number, because the mean of its divisors is an integer number (39090287026407).

Almost surely, 2^{78180574052813} is an apocalyptic number.

It is an amenable number.

78180574052813 is a deficient number, since it is larger than the sum of its proper divisors (1).

78180574052813 is an equidigital number, since it uses as much as digits as its factorization.

78180574052813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15052800, while the sum is 59.

The spelling of 78180574052813 in words is "seventy-eight trillion, one hundred eighty billion, five hundred seventy-four million, fifty-two thousand, eight hundred thirteen".