165511005650 has 48 divisors (see below), whose sum is σ = 312848590248. Its totient is φ = 65134080000.

The previous prime is 165511005643. The next prime is 165511005727. The reversal of 165511005650 is 56500115561.

It can be written as a sum of positive squares in 12 ways, for example, as 64009506001 + 101501499649 = 253001^2 + 318593^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 165511005650.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1407110 + ... + 1520190.

Almost surely, 2^165511005650 is an apocalyptic number.

165511005650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165511005650 is a deficient number, since it is larger than the sum of its proper divisors (147337584598).

165511005650 is a wasteful number, since it uses less digits than its factorization.

165511005650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113567 (or 113562 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 35.

It can be divided in two parts, 16551 and 1005650, that added together give a palindrome (1022201).

The spelling of 165511005650 in words is "one hundred sixty-five billion, five hundred eleven million, five thousand, six hundred fifty".