78145806277859 has 2 divisors, whose sum is σ = 78145806277860. Its totient is φ = 78145806277858.

The previous prime is 78145806277739. The next prime is 78145806277879. The reversal of 78145806277859 is 95877260854187.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78145806277859 - 2⁸ = 78145806277603 is a prime.

It is a super-4 number, since 4×78145806277859⁴ (a number of 57 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 78145806277859.

It is not a weakly prime, because it can be changed into another prime (78145806277879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39072903138929 + 39072903138930.

It is an arithmetic number, because the mean of its divisors is an integer number (39072903138930).

Almost surely, 2^{78145806277859} is an apocalyptic number.

78145806277859 is a deficient number, since it is larger than the sum of its proper divisors (1).

78145806277859 is an equidigital number, since it uses as much as digits as its factorization.

78145806277859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1896652800, while the sum is 77.

The spelling of 78145806277859 in words is "seventy-eight trillion, one hundred forty-five billion, eight hundred six million, two hundred seventy-seven thousand, eight hundred fifty-nine".