123611622637 has 2 divisors, whose sum is σ = 123611622638. Its totient is φ = 123611622636.

The previous prime is 123611622583. The next prime is 123611622661. The reversal of 123611622637 is 736226116321.

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., 104549402281 + 19062220356 = 323341^2 + 138066^2 .

It is an emirp because it is prime and its reverse (736226116321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123611622637 - 2⁷ = 123611622509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123611622637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123611622677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61805811318 + 61805811319.

It is an arithmetic number, because the mean of its divisors is an integer number (61805811319).

Almost surely, 2^123611622637 is an apocalyptic number.

It is an amenable number.

123611622637 is a deficient number, since it is larger than the sum of its proper divisors (1).

123611622637 is an equidigital number, since it uses as much as digits as its factorization.

123611622637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

Adding to 123611622637 its reverse (736226116321), we get a palindrome (859837738958).

The spelling of 123611622637 in words is "one hundred twenty-three billion, six hundred eleven million, six hundred twenty-two thousand, six hundred thirty-seven".