126319437637 has 2 divisors, whose sum is σ = 126319437638. Its totient is φ = 126319437636.

The previous prime is 126319437619. The next prime is 126319437677. The reversal of 126319437637 is 736734913621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71399046436 + 54920391201 = 267206^2 + 234351^2 .

It is a cyclic number.

It is not a de Polignac number, because 126319437637 - 2⁷ = 126319437509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126319437677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63159718818 + 63159718819.

It is an arithmetic number, because the mean of its divisors is an integer number (63159718819).

Almost surely, 2^126319437637 is an apocalyptic number.

It is an amenable number.

126319437637 is a deficient number, since it is larger than the sum of its proper divisors (1).

126319437637 is an equidigital number, since it uses as much as digits as its factorization.

126319437637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 52.

The spelling of 126319437637 in words is "one hundred twenty-six billion, three hundred nineteen million, four hundred thirty-seven thousand, six hundred thirty-seven".