1001061000556 has 24 divisors (see below), whose sum is σ = 1767306706704. Its totient is φ = 496133711040.

The previous prime is 1001061000551. The next prime is 1001061000559. The reversal of 1001061000556 is 6550001601001.

1001061000556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1001061000556.

It is not an unprimeable number, because it can be changed into a prime (1001061000551) 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, 1956175 + ... + 2414278.

It is an arithmetic number, because the mean of its divisors is an integer number (73637779446).

Almost surely, 2^{1001061000556} is an apocalyptic number.

It is an amenable number.

1001061000556 is a deficient number, since it is larger than the sum of its proper divisors (766245706148).

1001061000556 is a wasteful number, since it uses less digits than its factorization.

1001061000556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370961 (or 4370959 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 1001061000556 its reverse (6550001601001), we get a palindrome (7551062601557).

The spelling of 1001061000556 in words is "one trillion, one billion, sixty-one million, five hundred fifty-six", and thus it is an aban number.