16434165421661 has 8 divisors (see below), whose sum is σ = 18109921109280. Its totient is φ = 14817208179312.

The previous prime is 16434165421631. The next prime is 16434165421691. The reversal of 16434165421661 is 16612456143461.

It is an interprime number because it is at equal distance from previous prime (16434165421631) and next prime (16434165421691).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16434165421661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16434165421631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14699610731 + ... + 14699611848.

It is an arithmetic number, because the mean of its divisors is an integer number (2263740138660).

Almost surely, 2^{16434165421661} is an apocalyptic number.

It is an amenable number.

16434165421661 is a deficient number, since it is larger than the sum of its proper divisors (1675755687619).

16434165421661 is a wasteful number, since it uses less digits than its factorization.

16434165421661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29399222635.

The product of its digits is 2488320, while the sum is 50.

The spelling of 16434165421661 in words is "sixteen trillion, four hundred thirty-four billion, one hundred sixty-five million, four hundred twenty-one thousand, six hundred sixty-one".