15643351543 has 2 divisors, whose sum is σ = 15643351544. Its totient is φ = 15643351542.

The previous prime is 15643351531. The next prime is 15643351573. The reversal of 15643351543 is 34515334651.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15643351543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15643351496 and 15643351505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15643351513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7821675771 + 7821675772.

It is an arithmetic number, because the mean of its divisors is an integer number (7821675772).

Almost surely, 2^15643351543 is an apocalyptic number.

15643351543 is a deficient number, since it is larger than the sum of its proper divisors (1).

15643351543 is an equidigital number, since it uses as much as digits as its factorization.

15643351543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 40.

The spelling of 15643351543 in words is "fifteen billion, six hundred forty-three million, three hundred fifty-one thousand, five hundred forty-three".