78111552029473 has 2 divisors, whose sum is σ = 78111552029474. Its totient is φ = 78111552029472.

The previous prime is 78111552029461. The next prime is 78111552029557. The reversal of 78111552029473 is 37492025511187.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78054274137889 + 57277891584 = 8834833^2 + 239328^2 .

It is a cyclic number.

It is not a de Polignac number, because 78111552029473 - 2²¹ = 78111549932321 is a prime.

It is a super-2 number, since 2×78111552029473² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78111552021473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39055776014736 + 39055776014737.

It is an arithmetic number, because the mean of its divisors is an integer number (39055776014737).

Almost surely, 2^{78111552029473} is an apocalyptic number.

It is an amenable number.

78111552029473 is a deficient number, since it is larger than the sum of its proper divisors (1).

78111552029473 is an equidigital number, since it uses as much as digits as its factorization.

78111552029473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4233600, while the sum is 55.

The spelling of 78111552029473 in words is "seventy-eight trillion, one hundred eleven billion, five hundred fifty-two million, twenty-nine thousand, four hundred seventy-three".