165542245501 has 4 divisors (see below), whose sum is σ = 167149451872. Its totient is φ = 163935039132.

The previous prime is 165542245493. The next prime is 165542245537. The reversal of 165542245501 is 105542245561.

165542245501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165542245501 - 2³ = 165542245493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165542245541) 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 3 ways as a sum of consecutive naturals, for example, 803603031 + ... + 803603236.

It is an arithmetic number, because the mean of its divisors is an integer number (41787362968).

Almost surely, 2^165542245501 is an apocalyptic number.

It is an amenable number.

165542245501 is a deficient number, since it is larger than the sum of its proper divisors (1607206371).

165542245501 is a wasteful number, since it uses less digits than its factorization.

165542245501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607206370.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 165542245501 in words is "one hundred sixty-five billion, five hundred forty-two million, two hundred forty-five thousand, five hundred one".