165473222656 has 153 divisors (see below), whose sum is σ = 386678979579. Its totient is φ = 70604685312.

The previous prime is 165473222653. The next prime is 165473222671. The reversal of 165473222656 is 656222374561.

The square root of 165473222656 is 406784.

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

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165473222653) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 728956815 + ... + 728957041.

Almost surely, 2^165473222656 is an apocalyptic number.

165473222656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

165473222656 is the 406784-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165473222656

165473222656 is an abundant number, since it is smaller than the sum of its proper divisors (221205756923).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165473222656 is an frugal number, since it uses more digits than its factorization.

165473222656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 236 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 49.

Multiplying 165473222656 by its sum of digits (49), we get a square (8108187910144 = 2847488²).

165473222656 divided by its sum of digits (49) gives a square (3377004544 = 58112²).

It can be divided in two parts, 165473 and 222656, that added together give a square (388129 = 623²).

The spelling of 165473222656 in words is "one hundred sixty-five billion, four hundred seventy-three million, two hundred twenty-two thousand, six hundred fifty-six".