1325411777665 has 8 divisors (see below), whose sum is σ = 1606890980520. Its totient is φ = 1049398190592.

The previous prime is 1325411777663. The next prime is 1325411777693. The reversal of 1325411777665 is 5667771145231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 191578663809 + 1133833113856 = 437697^2 + 1064816^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1325411777665 - 2¹ = 1325411777663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1325411777663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1366403410 + ... + 1366404379.

It is an arithmetic number, because the mean of its divisors is an integer number (200861372565).

Almost surely, 2^{1325411777665} is an apocalyptic number.

It is an amenable number.

1325411777665 is a deficient number, since it is larger than the sum of its proper divisors (281479202855).

1325411777665 is an equidigital number, since it uses as much as digits as its factorization.

1325411777665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732807891.

The product of its digits is 7408800, while the sum is 55.

The spelling of 1325411777665 in words is "one trillion, three hundred twenty-five billion, four hundred eleven million, seven hundred seventy-seven thousand, six hundred sixty-five".