42878276887493 has 2 divisors, whose sum is σ = 42878276887494. Its totient is φ = 42878276887492.

The previous prime is 42878276887477. The next prime is 42878276887513. The reversal of 42878276887493 is 39478867287824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32295500165569 + 10582776721924 = 5682913^2 + 3253118^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878276887493 - 2⁴ = 42878276887477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42878276887393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439138443746 + 21439138443747.

It is an arithmetic number, because the mean of its divisors is an integer number (21439138443747).

Almost surely, 2^{42878276887493} is an apocalyptic number.

It is an amenable number.

42878276887493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878276887493 is an equidigital number, since it uses as much as digits as its factorization.

42878276887493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14566293504, while the sum is 83.

The spelling of 42878276887493 in words is "forty-two trillion, eight hundred seventy-eight billion, two hundred seventy-six million, eight hundred eighty-seven thousand, four hundred ninety-three".