42878516158493 has 2 divisors, whose sum is σ = 42878516158494. Its totient is φ = 42878516158492.

The previous prime is 42878516158453. The next prime is 42878516158547. The reversal of 42878516158493 is 39485161587824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35099783193049 + 7778732965444 = 5924507^2 + 2789038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42878516158493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42878516158453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439258079246 + 21439258079247.

It is an arithmetic number, because the mean of its divisors is an integer number (21439258079247).

Almost surely, 2^{42878516158493} is an apocalyptic number.

It is an amenable number.

42878516158493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878516158493 is an equidigital number, since it uses as much as digits as its factorization.

42878516158493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 464486400, while the sum is 71.

The spelling of 42878516158493 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred sixteen million, one hundred fifty-eight thousand, four hundred ninety-three".