126508321603 has 2 divisors, whose sum is σ = 126508321604. Its totient is φ = 126508321602.

The previous prime is 126508321567. The next prime is 126508321679. The reversal of 126508321603 is 306123805621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126508321603 - 2²¹ = 126506224451 is a prime.

It is not a weakly prime, because it can be changed into another prime (126508321003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63254160801 + 63254160802.

It is an arithmetic number, because the mean of its divisors is an integer number (63254160802).

Almost surely, 2^126508321603 is an apocalyptic number.

126508321603 is a deficient number, since it is larger than the sum of its proper divisors (1).

126508321603 is an equidigital number, since it uses as much as digits as its factorization.

126508321603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 126508321603 in words is "one hundred twenty-six billion, five hundred eight million, three hundred twenty-one thousand, six hundred three".