165050505551136 has 48 divisors (see below), whose sum is σ = 433860160809600. Its totient is φ = 54940316613888.

The previous prime is 165050505551131. The next prime is 165050505551171. The reversal of 165050505551136 is 631155505050561.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×165050505551136² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (165050505551131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195533271 + ... + 1195671318.

It is an arithmetic number, because the mean of its divisors is an integer number (9038753350200).

Almost surely, 2^{165050505551136} is an apocalyptic number.

165050505551136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165050505551136 is an abundant number, since it is smaller than the sum of its proper divisors (268809655258464).

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

165050505551136 is a wasteful number, since it uses less digits than its factorization.

165050505551136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391205321 (or 2391205313 counting only the distinct ones).

The product of its (nonzero) digits is 1687500, while the sum is 48.

The spelling of 165050505551136 in words is "one hundred sixty-five trillion, fifty billion, five hundred five million, five hundred fifty-one thousand, one hundred thirty-six".