161301574493 has 2 divisors, whose sum is σ = 161301574494. Its totient is φ = 161301574492.

The previous prime is 161301574417. The next prime is 161301574537. The reversal of 161301574493 is 394475103161.

It is an a-pointer prime, because the next prime (161301574537) can be obtained adding 161301574493 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160598158009 + 703416484 = 400747^2 + 26522^2 .

It is a cyclic number.

It is not a de Polignac number, because 161301574493 - 2¹⁴ = 161301558109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161301544493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80650787246 + 80650787247.

It is an arithmetic number, because the mean of its divisors is an integer number (80650787247).

Almost surely, 2^161301574493 is an apocalyptic number.

It is an amenable number.

161301574493 is a deficient number, since it is larger than the sum of its proper divisors (1).

161301574493 is an equidigital number, since it uses as much as digits as its factorization.

161301574493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 161301574493 in words is "one hundred sixty-one billion, three hundred one million, five hundred seventy-four thousand, four hundred ninety-three".