126603905253 has 16 divisors (see below), whose sum is σ = 198134298240. Its totient is φ = 70389815616.

The previous prime is 126603905249. The next prime is 126603905261. The reversal of 126603905253 is 352509306621.

It is a happy number.

It is not a de Polignac number, because 126603905253 - 2² = 126603905249 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126603905353) 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, 81468918 + ... + 81470471.

It is an arithmetic number, because the mean of its divisors is an integer number (12383393640).

Almost surely, 2^126603905253 is an apocalyptic number.

It is an amenable number.

126603905253 is a deficient number, since it is larger than the sum of its proper divisors (71530392987).

126603905253 is a wasteful number, since it uses less digits than its factorization.

126603905253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162939436.

The product of its (nonzero) digits is 291600, while the sum is 42.

The spelling of 126603905253 in words is "one hundred twenty-six billion, six hundred three million, nine hundred five thousand, two hundred fifty-three".