165551156144530 has 64 divisors (see below), whose sum is σ = 345669528250368. Its totient is φ = 56582809620480.

The previous prime is 165551156144519. The next prime is 165551156144533. The reversal of 165551156144530 is 35441651155561.

It is not an unprimeable number, because it can be changed into a prime (165551156144533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 892944079 + ... + 893129458.

It is an arithmetic number, because the mean of its divisors is an integer number (5401086378912).

Almost surely, 2^{165551156144530} is an apocalyptic number.

165551156144530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165551156144530 is an abundant number, since it is smaller than the sum of its proper divisors (180118372105838).

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

165551156144530 is a wasteful number, since it uses less digits than its factorization.

165551156144530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786073611.

The product of its (nonzero) digits is 5400000, while the sum is 52.

The spelling of 165551156144530 in words is "one hundred sixty-five trillion, five hundred fifty-one billion, one hundred fifty-six million, one hundred forty-four thousand, five hundred thirty".