1331405545413 has 4 divisors (see below), whose sum is σ = 1775207393888. Its totient is φ = 887603696940.

The previous prime is 1331405545399. The next prime is 1331405545427. The reversal of 1331405545413 is 3145455041331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1331405545399) and next prime (1331405545427).

It is not a de Polignac number, because 1331405545413 - 2⁵ = 1331405545381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331405545433) 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, 221900924233 + ... + 221900924238.

It is an arithmetic number, because the mean of its divisors is an integer number (443801848472).

Almost surely, 2^{1331405545413} is an apocalyptic number.

It is an amenable number.

1331405545413 is a deficient number, since it is larger than the sum of its proper divisors (443801848475).

1331405545413 is an equidigital number, since it uses as much as digits as its factorization.

1331405545413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443801848474.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 1331405545413 in words is "one trillion, three hundred thirty-one billion, four hundred five million, five hundred forty-five thousand, four hundred thirteen".