165021442542 has 48 divisors (see below), whose sum is σ = 390162492720. Its totient is φ = 49992163200.

The previous prime is 165021442529. The next prime is 165021442609. The reversal of 165021442542 is 245244120561.

165021442542 is a `hidden beast` number, since 1 + 6 + 50 + 21 + 4 + 42 + 542 = 666.

165021442542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165021442497 and 165021442506.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 583434 + ... + 818802.

It is an arithmetic number, because the mean of its divisors is an integer number (8128385265).

Almost surely, 2^165021442542 is an apocalyptic number.

165021442542 is an abundant number, since it is smaller than the sum of its proper divisors (225141050178).

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

165021442542 is a wasteful number, since it uses less digits than its factorization.

165021442542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238929 (or 238926 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 165021442542 in words is "one hundred sixty-five billion, twenty-one million, four hundred forty-two thousand, five hundred forty-two".