1331244520545 has 16 divisors (see below), whose sum is σ = 2134843159680. Its totient is φ = 708379768704.

The previous prime is 1331244520537. The next prime is 1331244520559. The reversal of 1331244520545 is 5450254421331.

It is not a de Polignac number, because 1331244520545 - 2³ = 1331244520537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101075004 + ... + 101088173.

It is an arithmetic number, because the mean of its divisors is an integer number (133427697480).

Almost surely, 2^{1331244520545} is an apocalyptic number.

1331244520545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331244520545 is a deficient number, since it is larger than the sum of its proper divisors (803598639135).

1331244520545 is a wasteful number, since it uses less digits than its factorization.

1331244520545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202163624.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 1331244520545 its reverse (5450254421331), we get a palindrome (6781498941876).

The spelling of 1331244520545 in words is "one trillion, three hundred thirty-one billion, two hundred forty-four million, five hundred twenty thousand, five hundred forty-five".