78195181453 has 2 divisors, whose sum is σ = 78195181454. Its totient is φ = 78195181452.

The previous prime is 78195181451. The next prime is 78195181529. The reversal of 78195181453 is 35418159187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65414200644 + 12780980809 = 255762^2 + 113053^2 .

It is a cyclic number.

It is not a de Polignac number, because 78195181453 - 2¹ = 78195181451 is a prime.

It is a super-2 number, since 2×78195181453² (a number of 23 digits) contains 22 as substring.

Together with 78195181451, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78195181453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78195181451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39097590726 + 39097590727.

It is an arithmetic number, because the mean of its divisors is an integer number (39097590727).

Almost surely, 2^78195181453 is an apocalyptic number.

It is an amenable number.

78195181453 is a deficient number, since it is larger than the sum of its proper divisors (1).

78195181453 is an equidigital number, since it uses as much as digits as its factorization.

78195181453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 52.

The spelling of 78195181453 in words is "seventy-eight billion, one hundred ninety-five million, one hundred eighty-one thousand, four hundred fifty-three".