161314405247 has 2 divisors, whose sum is σ = 161314405248. Its totient is φ = 161314405246.

The previous prime is 161314405243. The next prime is 161314405279. The reversal of 161314405247 is 742504413161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161314405247 - 2² = 161314405243 is a prime.

It is a super-3 number, since 3×161314405247³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 161314405247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161314405243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80657202623 + 80657202624.

It is an arithmetic number, because the mean of its divisors is an integer number (80657202624).

Almost surely, 2^161314405247 is an apocalyptic number.

161314405247 is a deficient number, since it is larger than the sum of its proper divisors (1).

161314405247 is an equidigital number, since it uses as much as digits as its factorization.

161314405247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 161314405247 in words is "one hundred sixty-one billion, three hundred fourteen million, four hundred five thousand, two hundred forty-seven".