165123451011 has 8 divisors (see below), whose sum is σ = 220355887104. Its totient is φ = 109986657800.

The previous prime is 165123450997. The next prime is 165123451019. The reversal of 165123451011 is 110154321561.

165123451011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165123451011 - 2¹⁴ = 165123434627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165123451011.

It is not an unprimeable number, because it can be changed into a prime (165123451019) 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, 23906691 + ... + 23913596.

It is an arithmetic number, because the mean of its divisors is an integer number (27544485888).

Almost surely, 2^165123451011 is an apocalyptic number.

165123451011 is a deficient number, since it is larger than the sum of its proper divisors (55232436093).

165123451011 is a wasteful number, since it uses less digits than its factorization.

165123451011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47821441.

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 165123451011 its reverse (110154321561), we get a palindrome (275277772572).

The spelling of 165123451011 in words is "one hundred sixty-five billion, one hundred twenty-three million, four hundred fifty-one thousand, eleven".