42861672461 has 2 divisors, whose sum is σ = 42861672462. Its totient is φ = 42861672460.

The previous prime is 42861672421. The next prime is 42861672493. The reversal of 42861672461 is 16427616824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31044678025 + 11816994436 = 176195^2 + 108706^2 .

It is a cyclic number.

It is not a de Polignac number, because 42861672461 - 2³⁰ = 41787930637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42861672421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21430836230 + 21430836231.

It is an arithmetic number, because the mean of its divisors is an integer number (21430836231).

Almost surely, 2^42861672461 is an apocalyptic number.

It is an amenable number.

42861672461 is a deficient number, since it is larger than the sum of its proper divisors (1).

42861672461 is an equidigital number, since it uses as much as digits as its factorization.

42861672461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 47.

The spelling of 42861672461 in words is "forty-two billion, eight hundred sixty-one million, six hundred seventy-two thousand, four hundred sixty-one".