179649205513 has 2 divisors, whose sum is σ = 179649205514. Its totient is φ = 179649205512.

The previous prime is 179649205451. The next prime is 179649205531. The reversal of 179649205513 is 315502946971.

Together with next prime (179649205531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153415572489 + 26233633024 = 391683^2 + 161968^2 .

It is a cyclic number.

It is not a de Polignac number, because 179649205513 - 2¹⁷ = 179649074441 is a prime.

It is not a weakly prime, because it can be changed into another prime (179649205313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89824602756 + 89824602757.

It is an arithmetic number, because the mean of its divisors is an integer number (89824602757).

Almost surely, 2^179649205513 is an apocalyptic number.

It is an amenable number.

179649205513 is a deficient number, since it is larger than the sum of its proper divisors (1).

179649205513 is an equidigital number, since it uses as much as digits as its factorization.

179649205513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 179649205513 in words is "one hundred seventy-nine billion, six hundred forty-nine million, two hundred five thousand, five hundred thirteen".