165631650 has 48 divisors (see below), whose sum is σ = 411589728. Its totient is φ = 44080000.

The previous prime is 165631633. The next prime is 165631651. The reversal of 165631650 is 56136561.

It is not an unprimeable number, because it can be changed into a prime (165631651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113425 + ... + 114875.

It is an arithmetic number, because the mean of its divisors is an integer number (8574786).

Almost surely, 2^165631650 is an apocalyptic number.

165631650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165631650 is an abundant number, since it is smaller than the sum of its proper divisors (245958078).

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

165631650 is a wasteful number, since it uses less digits than its factorization.

165631650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227 (or 2222 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 165631650 is about 12869.7960356798. The cubic root of 165631650 is about 549.1796585873.

The spelling of 165631650 in words is "one hundred sixty-five million, six hundred thirty-one thousand, six hundred fifty".