126404551305 has 12 divisors (see below), whose sum is σ = 219101222340. Its totient is φ = 67415760672.

The previous prime is 126404551277. The next prime is 126404551373. The reversal of 126404551305 is 503155404621.

126404551305 is a `hidden beast` number, since 1 + 2 + 640 + 4 + 5 + 5 + 1 + 3 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14873265936 + 111531285369 = 121956^2 + 333963^2 .

It is not a de Polignac number, because 126404551305 - 2¹⁰ = 126404550281 is a prime.

It is a super-2 number, since 2×126404551305² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126404551305.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1404494970 + ... + 1404495059.

It is an arithmetic number, because the mean of its divisors is an integer number (18258435195).

Almost surely, 2^126404551305 is an apocalyptic number.

126404551305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126404551305 is a deficient number, since it is larger than the sum of its proper divisors (92696671035).

126404551305 is a wasteful number, since it uses less digits than its factorization.

126404551305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808990040 (or 2808990037 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 126404551305 its reverse (503155404621), we get a palindrome (629559955926).

The spelling of 126404551305 in words is "one hundred twenty-six billion, four hundred four million, five hundred fifty-one thousand, three hundred five".