1406323531643 has 4 divisors (see below), whose sum is σ = 1436245308960. Its totient is φ = 1376401754328.

The previous prime is 1406323531519. The next prime is 1406323531661. The reversal of 1406323531643 is 3461353236041.

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

It is a cyclic number.

It is not a de Polignac number, because 1406323531643 - 2¹⁸ = 1406323269499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1406323531643.

It is not an unprimeable number, because it can be changed into a prime (1406323531843) 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, 14960888588 + ... + 14960888681.

It is an arithmetic number, because the mean of its divisors is an integer number (359061327240).

Almost surely, 2^{1406323531643} is an apocalyptic number.

1406323531643 is a deficient number, since it is larger than the sum of its proper divisors (29921777317).

1406323531643 is an equidigital number, since it uses as much as digits as its factorization.

1406323531643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29921777316.

The product of its (nonzero) digits is 466560, while the sum is 41.

Adding to 1406323531643 its reverse (3461353236041), we get a palindrome (4867676767684).

The spelling of 1406323531643 in words is "one trillion, four hundred six billion, three hundred twenty-three million, five hundred thirty-one thousand, six hundred forty-three".