165475816540 has 12 divisors (see below), whose sum is σ = 347499214776. Its totient is φ = 66190326608.

The previous prime is 165475816523. The next prime is 165475816543. The reversal of 165475816540 is 45618574561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165475816543) 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, 4136895394 + ... + 4136895433.

It is an arithmetic number, because the mean of its divisors is an integer number (28958267898).

Almost surely, 2^165475816540 is an apocalyptic number.

165475816540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165475816540 is an abundant number, since it is smaller than the sum of its proper divisors (182023398236).

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

165475816540 is a wasteful number, since it uses less digits than its factorization.

165475816540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8273790836 (or 8273790834 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 165475816540 in words is "one hundred sixty-five billion, four hundred seventy-five million, eight hundred sixteen thousand, five hundred forty".