1381358297345 has 16 divisors (see below), whose sum is σ = 1785220605840. Its totient is φ = 1020033886464.

The previous prime is 1381358297227. The next prime is 1381358297359. The reversal of 1381358297345 is 5437928531831.

It is a Cunningham number, because it is equal to 1175312²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 1381358297344 = 1^2 + 1175312^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381358297345 - 2³⁴ = 1364178428161 is a prime.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 1004747 + ... + 1942223.

It is an arithmetic number, because the mean of its divisors is an integer number (111576287865).

Almost surely, 2^{1381358297345} is an apocalyptic number.

It is an amenable number.

1381358297345 is a deficient number, since it is larger than the sum of its proper divisors (403862308495).

1381358297345 is a wasteful number, since it uses less digits than its factorization.

1381358297345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960164.

The product of its digits is 21772800, while the sum is 59.

The spelling of 1381358297345 in words is "one trillion, three hundred eighty-one billion, three hundred fifty-eight million, two hundred ninety-seven thousand, three hundred forty-five".