161887147423 has 2 divisors, whose sum is σ = 161887147424. Its totient is φ = 161887147422.

The previous prime is 161887147417. The next prime is 161887147453. The reversal of 161887147423 is 324741788161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161887147423 - 2⁵ = 161887147391 is a prime.

It is a super-2 number, since 2×161887147423² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161887147403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80943573711 + 80943573712.

It is an arithmetic number, because the mean of its divisors is an integer number (80943573712).

Almost surely, 2^161887147423 is an apocalyptic number.

161887147423 is a deficient number, since it is larger than the sum of its proper divisors (1).

161887147423 is an equidigital number, since it uses as much as digits as its factorization.

161887147423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 52.

The spelling of 161887147423 in words is "one hundred sixty-one billion, eight hundred eighty-seven million, one hundred forty-seven thousand, four hundred twenty-three".