1345440511553 has 16 divisors (see below), whose sum is σ = 1439498027520. Its totient is φ = 1255501872000.

The previous prime is 1345440511523. The next prime is 1345440511573. The reversal of 1345440511553 is 3551150445431.

It is a cyclic number.

It is not a de Polignac number, because 1345440511553 - 2⁸ = 1345440511297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

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 1345440511553.

It is not an unprimeable number, because it can be changed into a prime (1345440511523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7426673 + ... + 7605678.

It is an arithmetic number, because the mean of its divisors is an integer number (89968626720).

Almost surely, 2^{1345440511553} is an apocalyptic number.

It is an amenable number.

1345440511553 is a deficient number, since it is larger than the sum of its proper divisors (94057515967).

1345440511553 is a wasteful number, since it uses less digits than its factorization.

1345440511553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15032488.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 1345440511553 its reverse (3551150445431), we get a palindrome (4896590956984).

The spelling of 1345440511553 in words is "one trillion, three hundred forty-five billion, four hundred forty million, five hundred eleven thousand, five hundred fifty-three".