161370142709 has 2 divisors, whose sum is σ = 161370142710. Its totient is φ = 161370142708.

The previous prime is 161370142649. The next prime is 161370142777. The reversal of 161370142709 is 907241073161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132188962084 + 29181180625 = 363578^2 + 170825^2 .

It is a cyclic number.

It is not a de Polignac number, because 161370142709 - 2³⁶ = 92650665973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161370142789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80685071354 + 80685071355.

It is an arithmetic number, because the mean of its divisors is an integer number (80685071355).

Almost surely, 2^161370142709 is an apocalyptic number.

It is an amenable number.

161370142709 is a deficient number, since it is larger than the sum of its proper divisors (1).

161370142709 is an equidigital number, since it uses as much as digits as its factorization.

161370142709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 161370142709 in words is "one hundred sixty-one billion, three hundred seventy million, one hundred forty-two thousand, seven hundred nine".