555561642 has 32 divisors (see below), whose sum is σ = 1199422080. Its totient is φ = 171026240.

The previous prime is 555561593. The next prime is 555561659. The reversal of 555561642 is 246165555.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 555561642.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 65409 + ... + 73412.

It is an arithmetic number, because the mean of its divisors is an integer number (37481940).

Almost surely, 2^555561642 is an apocalyptic number.

555561642 is an abundant number, since it is smaller than the sum of its proper divisors (643860438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

555561642 is a wasteful number, since it uses less digits than its factorization.

555561642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138878.

The product of its digits is 180000, while the sum is 39.

The square root of 555561642 is about 23570.3551521822. The cubic root of 555561642 is about 822.0736935251.

The spelling of 555561642 in words is "five hundred fifty-five million, five hundred sixty-one thousand, six hundred forty-two".