42861672961 has 2 divisors, whose sum is σ = 42861672962. Its totient is φ = 42861672960.

The previous prime is 42861672881. The next prime is 42861673009. The reversal of 42861672961 is 16927616824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26746639936 + 16115033025 = 163544^2 + 126945^2 .

It is a cyclic number.

It is not a de Polignac number, because 42861672961 - 2¹¹ = 42861670913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42861672899 and 42861672908.

It is not a weakly prime, because it can be changed into another prime (42861672461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21430836480 + 21430836481.

It is an arithmetic number, because the mean of its divisors is an integer number (21430836481).

Almost surely, 2^42861672961 is an apocalyptic number.

It is an amenable number.

42861672961 is a deficient number, since it is larger than the sum of its proper divisors (1).

42861672961 is an equidigital number, since it uses as much as digits as its factorization.

42861672961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The spelling of 42861672961 in words is "forty-two billion, eight hundred sixty-one million, six hundred seventy-two thousand, nine hundred sixty-one".