165455324644 has 9 divisors (see below), whose sum is σ = 289548241801. Its totient is φ = 82727255560.

The previous prime is 165455324633. The next prime is 165455324689. The reversal of 165455324644 is 446423554561.

The square root of 165455324644 is 406762.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 68833819044 + 96621505600 = 262362^2 + 310840^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 711834 + ... + 915214.

Almost surely, 2^165455324644 is an apocalyptic number.

165455324644 is the 406762-nd square number.

It is an amenable number.

165455324644 is a deficient number, since it is larger than the sum of its proper divisors (124092917157).

165455324644 is an frugal number, since it uses more digits than its factorization.

165455324644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406766 (or 203383 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 49.

Multiplying 165455324644 by its sum of digits (49), we get a square (8107310907556 = 2847334²).

The spelling of 165455324644 in words is "one hundred sixty-five billion, four hundred fifty-five million, three hundred twenty-four thousand, six hundred forty-four".