555661011 has 8 divisors (see below), whose sum is σ = 740992464. Its totient is φ = 370385120.

The previous prime is 555661009. The next prime is 555661021. The reversal of 555661011 is 110166555.

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

It is a cyclic number.

It is not a de Polignac number, because 555661011 - 2¹ = 555661009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 555661011.

It is not an unprimeable number, because it can be changed into a prime (555661021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25021 + ... + 41681.

It is an arithmetic number, because the mean of its divisors is an integer number (92624058).

Almost surely, 2^555661011 is an apocalyptic number.

555661011 is a deficient number, since it is larger than the sum of its proper divisors (185331453).

555661011 is a wasteful number, since it uses less digits than its factorization.

555661011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27781.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 555661011 is about 23572.4629811991. The cubic root of 555661011 is about 822.1227032508.

The spelling of 555661011 in words is "five hundred fifty-five million, six hundred sixty-one thousand, eleven".