165741550 has 24 divisors (see below), whose sum is σ = 331994376. Its totient is φ = 61196640.

The previous prime is 165741539. The next prime is 165741571. The reversal of 165741550 is 55147561.

165741550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×165741550² = 54940522792805000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126844 + ... + 128143.

It is an arithmetic number, because the mean of its divisors is an integer number (13833099).

Almost surely, 2^165741550 is an apocalyptic number.

165741550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165741550 is an abundant number, since it is smaller than the sum of its proper divisors (166252826).

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

165741550 is a wasteful number, since it uses less digits than its factorization.

165741550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255012 (or 255007 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 165741550 is about 12874.0650145943. The cubic root of 165741550 is about 549.3010957251.

The spelling of 165741550 in words is "one hundred sixty-five million, seven hundred forty-one thousand, five hundred fifty".