16431741643 has 8 divisors (see below), whose sum is σ = 16583542976. Its totient is φ = 16280611200.

The previous prime is 16431741637. The next prime is 16431741713. The reversal of 16431741643 is 34614713461.

It is a happy number.

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-16431741643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16431741596 and 16431741605.

It is not an unprimeable number, because it can be changed into a prime (16431741043) 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, 118446 + ... + 216547.

It is an arithmetic number, because the mean of its divisors is an integer number (2072942872).

Almost surely, 2^16431741643 is an apocalyptic number.

16431741643 is a deficient number, since it is larger than the sum of its proper divisors (151801333).

16431741643 is a wasteful number, since it uses less digits than its factorization.

16431741643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335445.

The product of its digits is 145152, while the sum is 40.

The spelling of 16431741643 in words is "sixteen billion, four hundred thirty-one million, seven hundred forty-one thousand, six hundred forty-three".