1227509016173 has 6 divisors (see below), whose sum is σ = 1349245447662. Its totient is φ = 1115917287320.

The previous prime is 1227509016169. The next prime is 1227509016179. The reversal of 1227509016173 is 3716109057221.

It can be written as a sum of positive squares in only one way, i.e., 1055505554884 + 172003461289 = 1027378^2 + 414733^2 .

It is not a de Polignac number, because 1227509016173 - 2² = 1227509016169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227509016179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5072351186 + ... + 5072351427.

It is an arithmetic number, because the mean of its divisors is an integer number (224874241277).

Almost surely, 2^{1227509016173} is an apocalyptic number.

It is an amenable number.

1227509016173 is a deficient number, since it is larger than the sum of its proper divisors (121736431489).

1227509016173 is a wasteful number, since it uses less digits than its factorization.

1227509016173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10144702635 (or 10144702624 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 1227509016173 in words is "one trillion, two hundred twenty-seven billion, five hundred nine million, sixteen thousand, one hundred seventy-three".