87778852754819 has 2 divisors, whose sum is σ = 87778852754820. Its totient is φ = 87778852754818.

The previous prime is 87778852754779. The next prime is 87778852754849. The reversal of 87778852754819 is 91845725887778.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87778852754819 is a prime.

It is a super-2 number, since 2×87778852754819² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87778852754849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43889426377409 + 43889426377410.

It is an arithmetic number, because the mean of its divisors is an integer number (43889426377410).

Almost surely, 2^{87778852754819} is an apocalyptic number.

87778852754819 is a deficient number, since it is larger than the sum of its proper divisors (1).

87778852754819 is an equidigital number, since it uses as much as digits as its factorization.

87778852754819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17702092800, while the sum is 86.

The spelling of 87778852754819 in words is "eighty-seven trillion, seven hundred seventy-eight billion, eight hundred fifty-two million, seven hundred fifty-four thousand, eight hundred nineteen".