126503837026531 has 2 divisors, whose sum is σ = 126503837026532. Its totient is φ = 126503837026530.

The previous prime is 126503837026517. The next prime is 126503837026579. The reversal of 126503837026531 is 135620738305621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126503837026531 - 2⁵ = 126503837026499 is a prime.

It is a super-2 number, since 2×126503837026531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126503837026331) 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, 63251918513265 + 63251918513266.

It is an arithmetic number, because the mean of its divisors is an integer number (63251918513266).

Almost surely, 2^{126503837026531} is an apocalyptic number.

126503837026531 is a deficient number, since it is larger than the sum of its proper divisors (1).

126503837026531 is an equidigital number, since it uses as much as digits as its factorization.

126503837026531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 126503837026531 in words is "one hundred twenty-six trillion, five hundred three billion, eight hundred thirty-seven million, twenty-six thousand, five hundred thirty-one".