556770561 has 16 divisors (see below), whose sum is σ = 771004800. Its totient is φ = 357084288.

The previous prime is 556770559. The next prime is 556770563. The reversal of 556770561 is 165077655.

It is an interprime number because it is at equal distance from previous prime (556770559) and next prime (556770563).

It is not a de Polignac number, because 556770561 - 2¹ = 556770559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556770563) 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, 18301 + ... + 38058.

It is an arithmetic number, because the mean of its divisors is an integer number (48187800).

Almost surely, 2^556770561 is an apocalyptic number.

It is an amenable number.

556770561 is a deficient number, since it is larger than the sum of its proper divisors (214234239).

556770561 is a wasteful number, since it uses less digits than its factorization.

556770561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56488.

The product of its (nonzero) digits is 220500, while the sum is 42.

The square root of 556770561 is about 23595.9861205248. The cubic root of 556770561 is about 822.6695473070.

The spelling of 556770561 in words is "five hundred fifty-six million, seven hundred seventy thousand, five hundred sixty-one".