165533450040540 has 96 divisors (see below), whose sum is σ = 519992887464960. Its totient is φ = 43713687763008.

The previous prime is 165533450040493. The next prime is 165533450040601. The reversal of 165533450040540 is 45040054335561.

It is a happy number.

165533450040540 is a `hidden beast` number, since 1 + 6 + 5 + 53 + 3 + 4 + 50 + 0 + 4 + 0 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1488019264 + ... + 1488130503.

It is an arithmetic number, because the mean of its divisors is an integer number (5416592577760).

Almost surely, 2^{165533450040540} is an apocalyptic number.

165533450040540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165533450040540 is an abundant number, since it is smaller than the sum of its proper divisors (354459437424420).

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

165533450040540 is a wasteful number, since it uses less digits than its factorization.

165533450040540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976149888 (or 2976149880 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 45.

The spelling of 165533450040540 in words is "one hundred sixty-five trillion, five hundred thirty-three billion, four hundred fifty million, forty thousand, five hundred forty".