1390542859165 has 4 divisors (see below), whose sum is σ = 1668651431004. Its totient is φ = 1112434287328.

The previous prime is 1390542859151. The next prime is 1390542859171. The reversal of 1390542859165 is 5619582450931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 660835674724 + 729707184441 = 812918^2 + 854229^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390542859165 - 2¹⁵ = 1390542826397 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 139054285912 + ... + 139054285921.

It is an arithmetic number, because the mean of its divisors is an integer number (417162857751).

Almost surely, 2^{1390542859165} is an apocalyptic number.

It is an amenable number.

1390542859165 is a deficient number, since it is larger than the sum of its proper divisors (278108571839).

1390542859165 is an equidigital number, since it uses as much as digits as its factorization.

1390542859165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278108571838.

The product of its (nonzero) digits is 11664000, while the sum is 58.

The spelling of 1390542859165 in words is "one trillion, three hundred ninety billion, five hundred forty-two million, eight hundred fifty-nine thousand, one hundred sixty-five".