161043453372511 has 2 divisors, whose sum is σ = 161043453372512. Its totient is φ = 161043453372510.

The previous prime is 161043453372463. The next prime is 161043453372517. The reversal of 161043453372511 is 115273354340161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161043453372511 - 2²⁵ = 161043419818079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161043453372517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80521726686255 + 80521726686256.

It is an arithmetic number, because the mean of its divisors is an integer number (80521726686256).

Almost surely, 2^{161043453372511} is an apocalyptic number.

161043453372511 is a deficient number, since it is larger than the sum of its proper divisors (1).

161043453372511 is an equidigital number, since it uses as much as digits as its factorization.

161043453372511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 161043453372511 in words is "one hundred sixty-one trillion, forty-three billion, four hundred fifty-three million, three hundred seventy-two thousand, five hundred eleven".