42878536860281 has 2 divisors, whose sum is σ = 42878536860282. Its totient is φ = 42878536860280.

The previous prime is 42878536860277. The next prime is 42878536860283. The reversal of 42878536860281 is 18206863587824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42849906528256 + 28630332025 = 6545984^2 + 169205^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878536860281 - 2² = 42878536860277 is a prime.

It is a super-2 number, since 2×42878536860281² (a number of 28 digits) contains 22 as substring.

Together with 42878536860283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42878536860283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439268430140 + 21439268430141.

It is an arithmetic number, because the mean of its divisors is an integer number (21439268430141).

Almost surely, 2^{42878536860281} is an apocalyptic number.

It is an amenable number.

42878536860281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878536860281 is an equidigital number, since it uses as much as digits as its factorization.

42878536860281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 247726080, while the sum is 68.

The spelling of 42878536860281 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred thirty-six million, eight hundred sixty thousand, two hundred eighty-one".