1406323531644 has 96 divisors (see below), whose sum is σ = 3351264840000. Its totient is φ = 458910498816.

The previous prime is 1406323531519. The next prime is 1406323531661. The reversal of 1406323531644 is 4461353236041.

It is a junction number, because it is equal to n+sod(n) for n = 1406323531596 and 1406323531605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121764382 + ... + 121775930.

It is an arithmetic number, because the mean of its divisors is an integer number (34909008750).

Almost surely, 2^{1406323531644} is an apocalyptic number.

It is an amenable number.

1406323531644 is an abundant number, since it is smaller than the sum of its proper divisors (1944941308356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1406323531644 is a wasteful number, since it uses less digits than its factorization.

1406323531644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12767 (or 12765 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

Adding to 1406323531644 its reverse (4461353236041), we get a palindrome (5867676767685).

The spelling of 1406323531644 in words is "one trillion, four hundred six billion, three hundred twenty-three million, five hundred thirty-one thousand, six hundred forty-four".