165481040 has 20 divisors (see below), whose sum is σ = 384743604. Its totient is φ = 66192384.

The previous prime is 165481033. The next prime is 165481061. The reversal of 165481040 is 40184561.

It can be written as a sum of positive squares in 2 ways, for example, as 54051904 + 111429136 = 7352^2 + 10556^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 165480994 and 165481012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034177 + ... + 1034336.

Almost surely, 2^165481040 is an apocalyptic number.

165481040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165481040 is an abundant number, since it is smaller than the sum of its proper divisors (219262564).

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

165481040 is a wasteful number, since it uses less digits than its factorization.

165481040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068526 (or 2068520 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 165481040 is about 12863.9434078357. The cubic root of 165481040 is about 549.0131504929.

The spelling of 165481040 in words is "one hundred sixty-five million, four hundred eighty-one thousand, forty".