42878514420769 has 2 divisors, whose sum is σ = 42878514420770. Its totient is φ = 42878514420768.

The previous prime is 42878514420743. The next prime is 42878514420803. The reversal of 42878514420769 is 96702441587824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29303416307169 + 13575098113600 = 5413263^2 + 3684440^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878514420769 - 2⁹ = 42878514420257 is a prime.

It is a super-2 number, since 2×42878514420769² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42878517420769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439257210384 + 21439257210385.

It is an arithmetic number, because the mean of its divisors is an integer number (21439257210385).

Almost surely, 2^{42878514420769} is an apocalyptic number.

It is an amenable number.

42878514420769 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878514420769 is an equidigital number, since it uses as much as digits as its factorization.

42878514420769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216760320, while the sum is 67.

The spelling of 42878514420769 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred fourteen million, four hundred twenty thousand, seven hundred sixty-nine".