165720743376 has 80 divisors (see below), whose sum is σ = 446830448640. Its totient is φ = 52826083200.

The previous prime is 165720743359. The next prime is 165720743389. The reversal of 165720743376 is 673347027561.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5450745 + ... + 5481063.

It is an arithmetic number, because the mean of its divisors is an integer number (5585380608).

Almost surely, 2^165720743376 is an apocalyptic number.

165720743376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165720743376 is an abundant number, since it is smaller than the sum of its proper divisors (281109705264).

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

165720743376 is a wasteful number, since it uses less digits than its factorization.

165720743376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35304 (or 35298 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 51.

The spelling of 165720743376 in words is "one hundred sixty-five billion, seven hundred twenty million, seven hundred forty-three thousand, three hundred seventy-six".