557064621 has 14 divisors (see below), whose sum is σ = 835215950. Its totient is φ = 371375928.

The previous prime is 557064491. The next prime is 557064689. The reversal of 557064621 is 126460755.

It is a happy number.

557064621 is a `hidden beast` number, since 5 + 5 + 7 + 0 + 646 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 532917225 + 24147396 = 23085^2 + 4914^2 .

It is not a de Polignac number, because 557064621 - 2¹¹ = 557062573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557064121) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 381346 + ... + 382803.

Almost surely, 2^557064621 is an apocalyptic number.

It is an amenable number.

557064621 is a deficient number, since it is larger than the sum of its proper divisors (278151329).

557064621 is an frugal number, since it uses more digits than its factorization.

557064621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764167 (or 764152 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 557064621 is about 23602.2164425293. The cubic root of 557064621 is about 822.8143535925.

The spelling of 557064621 in words is "five hundred fifty-seven million, sixty-four thousand, six hundred twenty-one".