165541426542 has 16 divisors (see below), whose sum is σ = 367869836880. Its totient is φ = 55180475496.

The previous prime is 165541426513. The next prime is 165541426549. The reversal of 165541426542 is 245624145561.

165541426542 is a `hidden beast` number, since 1 + 6 + 5 + 541 + 4 + 2 + 65 + 42 = 666.

165541426542 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-3 number, since 3×165541426542³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165541426549) 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, 1532790933 + ... + 1532791040.

It is an arithmetic number, because the mean of its divisors is an integer number (22991864805).

Almost surely, 2^165541426542 is an apocalyptic number.

165541426542 is an abundant number, since it is smaller than the sum of its proper divisors (202328410338).

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

165541426542 is a wasteful number, since it uses less digits than its factorization.

165541426542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065581984 (or 3065581978 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The spelling of 165541426542 in words is "one hundred sixty-five billion, five hundred forty-one million, four hundred twenty-six thousand, five hundred forty-two".