1006161556 has 6 divisors (see below), whose sum is σ = 1760782730. Its totient is φ = 503080776.

The previous prime is 1006161551. The next prime is 1006161589. The reversal of 1006161556 is 6551616001.

It can be written as a sum of positive squares in only one way, i.e., 954810000 + 51351556 = 30900^2 + 7166^2 .

It is a super-2 number, since 2×1006161556² = 2024722153544682272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006161551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125770191 + ... + 125770198.

Almost surely, 2^1006161556 is an apocalyptic number.

It is an amenable number.

1006161556 is a deficient number, since it is larger than the sum of its proper divisors (754621174).

1006161556 is a wasteful number, since it uses less digits than its factorization.

1006161556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251540393 (or 251540391 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1006161556 is about 31720.0497477542. The cubic root of 1006161556 is about 1002.0496480725.

Adding to 1006161556 its reverse (6551616001), we get a palindrome (7557777557).

It can be divided in two parts, 10061 and 61556, that added together give a palindrome (71617).

The spelling of 1006161556 in words is "one billion, six million, one hundred sixty-one thousand, five hundred fifty-six".