165116623140251 has 32 divisors (see below), whose sum is σ = 179659166400000. Its totient is φ = 151214867407872.

The previous prime is 165116623140229. The next prime is 165116623140253. The reversal of 165116623140251 is 152041326611561.

It is a cyclic number.

It is not a de Polignac number, because 165116623140251 - 2³⁴ = 165099443271067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165116623140253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246089675 + ... + 246759723.

It is an arithmetic number, because the mean of its divisors is an integer number (5614348950000).

Almost surely, 2^{165116623140251} is an apocalyptic number.

165116623140251 is a deficient number, since it is larger than the sum of its proper divisors (14542543259749).

165116623140251 is a wasteful number, since it uses less digits than its factorization.

165116623140251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672371.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 165116623140251 in words is "one hundred sixty-five trillion, one hundred sixteen billion, six hundred twenty-three million, one hundred forty thousand, two hundred fifty-one".