1005506636 has 12 divisors (see below), whose sum is σ = 1762123440. Its totient is φ = 502042800.

The previous prime is 1005506533. The next prime is 1005506639. The reversal of 1005506636 is 6366055001.

It is a super-2 number, since 2×1005506636² = 2022087190080072992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1005506639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174440 + ... + 180111.

It is an arithmetic number, because the mean of its divisors is an integer number (146843620).

Almost surely, 2^1005506636 is an apocalyptic number.

It is an amenable number.

1005506636 is a deficient number, since it is larger than the sum of its proper divisors (756616804).

1005506636 is a wasteful number, since it uses less digits than its factorization.

1005506636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355264 (or 355262 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 1005506636 is about 31709.7246282588. The cubic root of 1005506636 is about 1001.8321863763.

The spelling of 1005506636 in words is "one billion, five million, five hundred six thousand, six hundred thirty-six".