165474318720 has 128 divisors (see below), whose sum is σ = 532379485440. Its totient is φ = 43714033664.

The previous prime is 165474318707. The next prime is 165474318727. The reversal of 165474318720 is 27813474561.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 165474318720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165474318727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197292 + ... + 608171.

It is an arithmetic number, because the mean of its divisors is an integer number (4159214730).

Almost surely, 2^165474318720 is an apocalyptic number.

165474318720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165474318720 is an abundant number, since it is smaller than the sum of its proper divisors (366905166720).

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

165474318720 is a wasteful number, since it uses less digits than its factorization.

165474318720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805592 (or 805580 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 165474318720 in words is "one hundred sixty-five billion, four hundred seventy-four million, three hundred eighteen thousand, seven hundred twenty".