555126561 has 16 divisors (see below), whose sum is σ = 897174720. Its totient is φ = 336440160.

The previous prime is 555126547. The next prime is 555126563. The reversal of 555126561 is 165621555.

It is not a de Polignac number, because 555126561 - 2¹⁹ = 554602273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (555126563) 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, 934260 + ... + 934853.

It is an arithmetic number, because the mean of its divisors is an integer number (56073420).

Almost surely, 2^555126561 is an apocalyptic number.

It is an amenable number.

555126561 is a deficient number, since it is larger than the sum of its proper divisors (342048159).

555126561 is a wasteful number, since it uses less digits than its factorization.

555126561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869133 (or 1869127 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 555126561 is about 23561.1239332932. The cubic root of 555126561 is about 821.8590386449.

The spelling of 555126561 in words is "five hundred fifty-five million, one hundred twenty-six thousand, five hundred sixty-one".