42878514406447 has 2 divisors, whose sum is σ = 42878514406448. Its totient is φ = 42878514406446.

The previous prime is 42878514406363. The next prime is 42878514406487. The reversal of 42878514406447 is 74460441587824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42878514406447 - 2⁷ = 42878514406319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42878514406487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439257203223 + 21439257203224.

It is an arithmetic number, because the mean of its divisors is an integer number (21439257203224).

Almost surely, 2^{42878514406447} is an apocalyptic number.

42878514406447 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878514406447 is an equidigital number, since it uses as much as digits as its factorization.

42878514406447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192675840, while the sum is 64.

The spelling of 42878514406447 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred fourteen million, four hundred six thousand, four hundred forty-seven".