126206321603 has 16 divisors (see below), whose sum is σ = 130453557696. Its totient is φ = 122038824960.

The previous prime is 126206321599. The next prime is 126206321611. The reversal of 126206321603 is 306123602621.

It is a cyclic number.

It is not a de Polignac number, because 126206321603 - 2² = 126206321599 is a prime.

It is a super-2 number, since 2×126206321603² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126206321603.

It is not an unprimeable number, because it can be changed into a prime (126206321663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188050 + ... + 1289912.

It is an arithmetic number, because the mean of its divisors is an integer number (8153347356).

Almost surely, 2^126206321603 is an apocalyptic number.

126206321603 is a deficient number, since it is larger than the sum of its proper divisors (4247236093).

126206321603 is a wasteful number, since it uses less digits than its factorization.

126206321603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102254.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 126206321603 in words is "one hundred twenty-six billion, two hundred six million, three hundred twenty-one thousand, six hundred three".