42878276805841 has 2 divisors, whose sum is σ = 42878276805842. Its totient is φ = 42878276805840.

The previous prime is 42878276805809. The next prime is 42878276805857. The reversal of 42878276805841 is 14850867287824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32710724210241 + 10167552595600 = 5719329^2 + 3188660^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878276805841 - 2⁵ = 42878276805809 is a prime.

It is a super-2 number, since 2×42878276805841² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42878276805341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439138402920 + 21439138402921.

It is an arithmetic number, because the mean of its divisors is an integer number (21439138402921).

Almost surely, 2^{42878276805841} is an apocalyptic number.

It is an amenable number.

42878276805841 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878276805841 is an equidigital number, since it uses as much as digits as its factorization.

42878276805841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 385351680, while the sum is 70.

The spelling of 42878276805841 in words is "forty-two trillion, eight hundred seventy-eight billion, two hundred seventy-six million, eight hundred five thousand, eight hundred forty-one".