42219042637 has 2 divisors, whose sum is σ = 42219042638. Its totient is φ = 42219042636.

The previous prime is 42219042583. The next prime is 42219042707. The reversal of 42219042637 is 73624091224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41165975236 + 1053067401 = 202894^2 + 32451^2 .

It is a cyclic number.

It is not a de Polignac number, because 42219042637 - 2³⁵ = 7859304269 is a prime.

It is a super-2 number, since 2×42219042637² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42219042637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42219040637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21109521318 + 21109521319.

It is an arithmetic number, because the mean of its divisors is an integer number (21109521319).

Almost surely, 2^42219042637 is an apocalyptic number.

It is an amenable number.

42219042637 is a deficient number, since it is larger than the sum of its proper divisors (1).

42219042637 is an equidigital number, since it uses as much as digits as its factorization.

42219042637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 42219042637 in words is "forty-two billion, two hundred nineteen million, forty-two thousand, six hundred thirty-seven".