173640890071063 has 2 divisors, whose sum is σ = 173640890071064. Its totient is φ = 173640890071062.

The previous prime is 173640890071027. The next prime is 173640890071097. The reversal of 173640890071063 is 360170098046371.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 173640890071063 - 2⁹ = 173640890070551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 173640890070995 and 173640890071013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173640896071063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86820445035531 + 86820445035532.

It is an arithmetic number, because the mean of its divisors is an integer number (86820445035532).

Almost surely, 2^{173640890071063} is an apocalyptic number.

173640890071063 is a deficient number, since it is larger than the sum of its proper divisors (1).

173640890071063 is an equidigital number, since it uses as much as digits as its factorization.

173640890071063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 173640890071063 in words is "one hundred seventy-three trillion, six hundred forty billion, eight hundred ninety million, seventy-one thousand, sixty-three".