557126691 has 16 divisors (see below), whose sum is σ = 818238720. Its totient is φ = 334372320.

The previous prime is 557126681. The next prime is 557126693. The reversal of 557126691 is 196621755.

It is a de Polignac number, because none of the positive numbers 2^k-557126691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (557126693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78556 + ... + 85353.

It is an arithmetic number, because the mean of its divisors is an integer number (51139920).

Almost surely, 2^557126691 is an apocalyptic number.

557126691 is a deficient number, since it is larger than the sum of its proper divisors (261112029).

557126691 is a wasteful number, since it uses less digits than its factorization.

557126691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164026.

The product of its digits is 113400, while the sum is 42.

The square root of 557126691 is about 23603.5313247827. The cubic root of 557126691 is about 822.8449126983.

The spelling of 557126691 in words is "five hundred fifty-seven million, one hundred twenty-six thousand, six hundred ninety-one".