126601437493 has 2 divisors, whose sum is σ = 126601437494. Its totient is φ = 126601437492.

The previous prime is 126601437467. The next prime is 126601437533. The reversal of 126601437493 is 394734106621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91626079204 + 34975358289 = 302698^2 + 187017^2 .

It is a cyclic number.

It is not a de Polignac number, because 126601437493 - 2²⁵ = 126567883061 is a prime.

It is a super-2 number, since 2×126601437493² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126601437463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63300718746 + 63300718747.

It is an arithmetic number, because the mean of its divisors is an integer number (63300718747).

Almost surely, 2^126601437493 is an apocalyptic number.

It is an amenable number.

126601437493 is a deficient number, since it is larger than the sum of its proper divisors (1).

126601437493 is an equidigital number, since it uses as much as digits as its factorization.

126601437493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 126601437493 in words is "one hundred twenty-six billion, six hundred one million, four hundred thirty-seven thousand, four hundred ninety-three".