161155511893469 has 2 divisors, whose sum is σ = 161155511893470. Its totient is φ = 161155511893468.

The previous prime is 161155511893457. The next prime is 161155511893483. The reversal of 161155511893469 is 964398115551161.

161155511893469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155511798970969 + 5643712922500 = 12470437^2 + 2375650^2 .

It is a cyclic number.

It is not a de Polignac number, because 161155511893469 - 2²⁰ = 161155510844893 is a prime.

It is a super-2 number, since 2×161155511893469² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161155511893429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80577755946734 + 80577755946735.

It is an arithmetic number, because the mean of its divisors is an integer number (80577755946735).

Almost surely, 2^{161155511893469} is an apocalyptic number.

It is an amenable number.

161155511893469 is a deficient number, since it is larger than the sum of its proper divisors (1).

161155511893469 is an equidigital number, since it uses as much as digits as its factorization.

161155511893469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992000, while the sum is 65.

The spelling of 161155511893469 in words is "one hundred sixty-one trillion, one hundred fifty-five billion, five hundred eleven million, eight hundred ninety-three thousand, four hundred sixty-nine".