557129978 has 8 divisors (see below), whose sum is σ = 839344980. Its totient is φ = 277348320.

The previous prime is 557129977. The next prime is 557129981. The reversal of 557129978 is 879921755.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 551451289 + 5678689 = 23483^2 + 2383^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (557129977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607763 + ... + 608678.

Almost surely, 2^557129978 is an apocalyptic number.

557129978 is a deficient number, since it is larger than the sum of its proper divisors (282215002).

557129978 is a wasteful number, since it uses less digits than its factorization.

557129978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216672.

The product of its digits is 1587600, while the sum is 53.

The square root of 557129978 is about 23603.6009540917. The cubic root of 557129978 is about 822.8465309334.

The spelling of 557129978 in words is "five hundred fifty-seven million, one hundred twenty-nine thousand, nine hundred seventy-eight".