161405577414343 has 4 divisors (see below), whose sum is σ = 161734305678408. Its totient is φ = 161076849150280.

The previous prime is 161405577414299. The next prime is 161405577414371. The reversal of 161405577414343 is 343414775504161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161405577414343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161405577414383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164364131296 + ... + 164364132277.

It is an arithmetic number, because the mean of its divisors is an integer number (40433576419602).

Almost surely, 2^{161405577414343} is an apocalyptic number.

161405577414343 is a deficient number, since it is larger than the sum of its proper divisors (328728264065).

161405577414343 is an equidigital number, since it uses as much as digits as its factorization.

161405577414343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328728264064.

The product of its (nonzero) digits is 16934400, while the sum is 55.

The spelling of 161405577414343 in words is "one hundred sixty-one trillion, four hundred five billion, five hundred seventy-seven million, four hundred fourteen thousand, three hundred forty-three".