42878276887393 has 2 divisors, whose sum is σ = 42878276887394. Its totient is φ = 42878276887392.

The previous prime is 42878276887249. The next prime is 42878276887471. The reversal of 42878276887393 is 39378867287824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35959967135569 + 6918309751824 = 5996663^2 + 2630268^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878276887393 - 2²⁵ = 42878243332961 is a prime.

It is a super-3 number, since 3×42878276887393³ (a number of 42 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42878276887493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439138443696 + 21439138443697.

It is an arithmetic number, because the mean of its divisors is an integer number (21439138443697).

Almost surely, 2^{42878276887393} is an apocalyptic number.

It is an amenable number.

42878276887393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878276887393 is an equidigital number, since it uses as much as digits as its factorization.

42878276887393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10924720128, while the sum is 82.

The spelling of 42878276887393 in words is "forty-two trillion, eight hundred seventy-eight billion, two hundred seventy-six million, eight hundred eighty-seven thousand, three hundred ninety-three".