165907653423 has 8 divisors (see below), whose sum is σ = 224325841536. Its totient is φ = 109047283800.

The previous prime is 165907653407. The next prime is 165907653437. The reversal of 165907653423 is 324356709561.

It is a happy number.

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

It is not a de Polignac number, because 165907653423 - 2⁴ = 165907653407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165907653463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389454373 + ... + 389454798.

It is an arithmetic number, because the mean of its divisors is an integer number (28040730192).

Almost surely, 2^165907653423 is an apocalyptic number.

165907653423 is a deficient number, since it is larger than the sum of its proper divisors (58418188113).

165907653423 is an equidigital number, since it uses as much as digits as its factorization.

165907653423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778909245.

The product of its (nonzero) digits is 4082400, while the sum is 51.

The spelling of 165907653423 in words is "one hundred sixty-five billion, nine hundred seven million, six hundred fifty-three thousand, four hundred twenty-three".