165145463524640 has 96 divisors (see below), whose sum is σ = 396911299176000. Its totient is φ = 64915260986368.

The previous prime is 165145463524597. The next prime is 165145463524661. The reversal of 165145463524640 is 46425364541561.

It is a happy 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, 23191871 + ... + 29464449.

It is an arithmetic number, because the mean of its divisors is an integer number (4134492699750).

Almost surely, 2^{165145463524640} is an apocalyptic number.

165145463524640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165145463524640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198455649588000).

165145463524640 is an abundant number, since it is smaller than the sum of its proper divisors (231765835651360).

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

165145463524640 is a wasteful number, since it uses less digits than its factorization.

165145463524640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6275442 (or 6275434 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 56.

The spelling of 165145463524640 in words is "one hundred sixty-five trillion, one hundred forty-five billion, four hundred sixty-three million, five hundred twenty-four thousand, six hundred forty".