42878787133541 has 2 divisors, whose sum is σ = 42878787133542. Its totient is φ = 42878787133540.

The previous prime is 42878787133531. The next prime is 42878787133583. The reversal of 42878787133541 is 14533178787824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22496722511041 + 20382064622500 = 4743071^2 + 4514650^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878787133541 - 2¹⁸ = 42878786871397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42878787133531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439393566770 + 21439393566771.

It is an arithmetic number, because the mean of its divisors is an integer number (21439393566771).

Almost surely, 2^{42878787133541} is an apocalyptic number.

It is an amenable number.

42878787133541 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878787133541 is an equidigital number, since it uses as much as digits as its factorization.

42878787133541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252887040, while the sum is 68.

The spelling of 42878787133541 in words is "forty-two trillion, eight hundred seventy-eight billion, seven hundred eighty-seven million, one hundred thirty-three thousand, five hundred forty-one".