165503747456 has 32 divisors (see below), whose sum is σ = 329749490280. Its totient is φ = 82743091200.

The previous prime is 165503747449. The next prime is 165503747459. The reversal of 165503747456 is 654747305561.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 165503747398 and 165503747407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165503747459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239131 + ... + 1366181.

Almost surely, 2^165503747456 is an apocalyptic number.

165503747456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165503747456 is a deficient number, since it is larger than the sum of its proper divisors (164245742824).

165503747456 is a wasteful number, since it uses less digits than its factorization.

165503747456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137242 (or 137230 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 53.

The spelling of 165503747456 in words is "one hundred sixty-five billion, five hundred three million, seven hundred forty-seven thousand, four hundred fifty-six".