165656501236103 has 4 divisors (see below), whose sum is σ = 165656719279440. Its totient is φ = 165656283192768.

The previous prime is 165656501236097. The next prime is 165656501236129. The reversal of 165656501236103 is 301632105656561.

165656501236103 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.

It is a cyclic number.

It is not a de Polignac number, because 165656501236103 - 2¹⁸ = 165656500973959 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165656501286103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107878058 + ... + 109402871.

It is an arithmetic number, because the mean of its divisors is an integer number (41414179819860).

Almost surely, 2^{165656501236103} is an apocalyptic number.

165656501236103 is a deficient number, since it is larger than the sum of its proper divisors (218043337).

165656501236103 is an equidigital number, since it uses as much as digits as its factorization.

165656501236103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218043336.

The product of its (nonzero) digits is 2916000, while the sum is 50.

The spelling of 165656501236103 in words is "one hundred sixty-five trillion, six hundred fifty-six billion, five hundred one million, two hundred thirty-six thousand, one hundred three".