165641314051 has 2 divisors, whose sum is σ = 165641314052. Its totient is φ = 165641314050.

The previous prime is 165641313989. The next prime is 165641314109. The reversal of 165641314051 is 150413146561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165641314051 - 2¹¹ = 165641312003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165641314051.

It is not a weakly prime, because it can be changed into another prime (165641314451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82820657025 + 82820657026.

It is an arithmetic number, because the mean of its divisors is an integer number (82820657026).

Almost surely, 2^165641314051 is an apocalyptic number.

165641314051 is a deficient number, since it is larger than the sum of its proper divisors (1).

165641314051 is an equidigital number, since it uses as much as digits as its factorization.

165641314051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 165641314051 in words is "one hundred sixty-five billion, six hundred forty-one million, three hundred fourteen thousand, fifty-one".