1355611401065 has 8 divisors (see below), whose sum is σ = 1657426769928. Its totient is φ = 1064027061760.

The previous prime is 1355611401043. The next prime is 1355611401119. The reversal of 1355611401065 is 5601041165531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21209844496 + 1334401556569 = 145636^2 + 1155163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1355611401065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2557757096 + ... + 2557757625.

It is an arithmetic number, because the mean of its divisors is an integer number (207178346241).

Almost surely, 2^{1355611401065} is an apocalyptic number.

It is an amenable number.

1355611401065 is a deficient number, since it is larger than the sum of its proper divisors (301815368863).

1355611401065 is an equidigital number, since it uses as much as digits as its factorization.

1355611401065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115514779.

The product of its (nonzero) digits is 54000, while the sum is 38.

Adding to 1355611401065 its reverse (5601041165531), we get a palindrome (6956652566596).

The spelling of 1355611401065 in words is "one trillion, three hundred fifty-five billion, six hundred eleven million, four hundred one thousand, sixty-five".