1351165456265 has 12 divisors (see below), whose sum is σ = 1679236788684. Its totient is φ = 1043658831936.

The previous prime is 1351165456261. The next prime is 1351165456273. The reversal of 1351165456265 is 5626545611531.

It can be written as a sum of positive squares in 6 ways, for example, as 16209363856 + 1334956092409 = 127316^2 + 1155403^2 .

It is not a de Polignac number, because 1351165456265 - 2² = 1351165456261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1351165456261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160657562 + ... + 160665971.

It is an arithmetic number, because the mean of its divisors is an integer number (139936399057).

Almost surely, 2^{1351165456265} is an apocalyptic number.

It is an amenable number.

1351165456265 is a deficient number, since it is larger than the sum of its proper divisors (328071332419).

1351165456265 is an equidigital number, since it uses as much as digits as its factorization.

1351165456265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321323596 (or 321323567 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 50.

The spelling of 1351165456265 in words is "one trillion, three hundred fifty-one billion, one hundred sixty-five million, four hundred fifty-six thousand, two hundred sixty-five".