16161097543 has 2 divisors, whose sum is σ = 16161097544. Its totient is φ = 16161097542.

The previous prime is 16161097489. The next prime is 16161097553. The reversal of 16161097543 is 34579016161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16161097543 - 2⁹ = 16161097031 is a prime.

It is a super-2 number, since 2×16161097543² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16161097543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16161097553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8080548771 + 8080548772.

It is an arithmetic number, because the mean of its divisors is an integer number (8080548772).

Almost surely, 2^16161097543 is an apocalyptic number.

16161097543 is a deficient number, since it is larger than the sum of its proper divisors (1).

16161097543 is an equidigital number, since it uses as much as digits as its factorization.

16161097543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 16161097543 in words is "sixteen billion, one hundred sixty-one million, ninety-seven thousand, five hundred forty-three".