42878535237997 has 2 divisors, whose sum is σ = 42878535237998. Its totient is φ = 42878535237996.

The previous prime is 42878535237971. The next prime is 42878535238103. The reversal of 42878535237997 is 79973253587824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26580407273161 + 16298127964836 = 5155619^2 + 4037094^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878535237997 - 2¹⁵ = 42878535205229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42878535237497) 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, 21439267618998 + 21439267618999.

It is an arithmetic number, because the mean of its divisors is an integer number (21439267618999).

Almost surely, 2^{42878535237997} is an apocalyptic number.

It is an amenable number.

42878535237997 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878535237997 is an equidigital number, since it uses as much as digits as its factorization.

42878535237997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6401203200, while the sum is 79.

The spelling of 42878535237997 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred thirty-five million, two hundred thirty-seven thousand, nine hundred ninety-seven".