1375260217565 has 8 divisors (see below), whose sum is σ = 1777259358168. Its totient is φ = 1015576776000.

The previous prime is 1375260217517. The next prime is 1375260217577. The reversal of 1375260217565 is 5657120625731.

It can be written as a sum of positive squares in 4 ways, for example, as 186591169444 + 1188669048121 = 431962^2 + 1090261^2 .

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

It is not a de Polignac number, because 1375260217565 - 2²⁶ = 1375193108701 is a prime.

It is a super-2 number, since 2×1375260217565² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10578924686 + ... + 10578924815.

It is an arithmetic number, because the mean of its divisors is an integer number (222157419771).

Almost surely, 2^{1375260217565} is an apocalyptic number.

It is an amenable number.

1375260217565 is a deficient number, since it is larger than the sum of its proper divisors (401999140603).

1375260217565 is a wasteful number, since it uses less digits than its factorization.

1375260217565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21157849519.

The product of its (nonzero) digits is 2646000, while the sum is 50.

The spelling of 1375260217565 in words is "one trillion, three hundred seventy-five billion, two hundred sixty million, two hundred seventeen thousand, five hundred sixty-five".