557661265 has 16 divisors (see below), whose sum is σ = 766386432. Its totient is φ = 381599424.

The previous prime is 557661241. The next prime is 557661277. The reversal of 557661265 is 562166755.

It is a cyclic number.

It is not a de Polignac number, because 557661265 - 2¹⁹ = 557136977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687 + ... + 33403.

It is an arithmetic number, because the mean of its divisors is an integer number (47899152).

Almost surely, 2^557661265 is an apocalyptic number.

It is an amenable number.

557661265 is a deficient number, since it is larger than the sum of its proper divisors (208725167).

557661265 is a wasteful number, since it uses less digits than its factorization.

557661265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33216.

The product of its digits is 378000, while the sum is 43.

The square root of 557661265 is about 23614.8526355766. The cubic root of 557661265 is about 823.1080071853.

The spelling of 557661265 in words is "five hundred fifty-seven million, six hundred sixty-one thousand, two hundred sixty-five".