42604686281 has 2 divisors, whose sum is σ = 42604686282. Its totient is φ = 42604686280.

The previous prime is 42604686263. The next prime is 42604686283. The reversal of 42604686281 is 18268640624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31078516681 + 11526169600 = 176291^2 + 107360^2 .

It is a cyclic number.

It is not a de Polignac number, because 42604686281 - 2²² = 42600491977 is a prime.

It is a super-4 number, since 4×42604686281⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 42604686283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42604686283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21302343140 + 21302343141.

It is an arithmetic number, because the mean of its divisors is an integer number (21302343141).

Almost surely, 2^42604686281 is an apocalyptic number.

It is an amenable number.

42604686281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42604686281 is an equidigital number, since it uses as much as digits as its factorization.

42604686281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 884736, while the sum is 47.

The spelling of 42604686281 in words is "forty-two billion, six hundred four million, six hundred eighty-six thousand, two hundred eighty-one".