42861672881 has 2 divisors, whose sum is σ = 42861672882. Its totient is φ = 42861672880.

The previous prime is 42861672871. The next prime is 42861672961. The reversal of 42861672881 is 18827616824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25035150625 + 17826522256 = 158225^2 + 133516^2 .

It is a cyclic number.

It is not a de Polignac number, because 42861672881 - 2³⁰ = 41787931057 is a prime.

It is a super-2 number, since 2×42861672881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42861672871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21430836440 + 21430836441.

It is an arithmetic number, because the mean of its divisors is an integer number (21430836441).

Almost surely, 2^42861672881 is an apocalyptic number.

It is an amenable number.

42861672881 is a deficient number, since it is larger than the sum of its proper divisors (1).

42861672881 is an equidigital number, since it uses as much as digits as its factorization.

42861672881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2064384, while the sum is 53.

The spelling of 42861672881 in words is "forty-two billion, eight hundred sixty-one million, six hundred seventy-two thousand, eight hundred eighty-one".