1608902460965 has 4 divisors (see below), whose sum is σ = 1930682953164. Its totient is φ = 1287121968768.

The previous prime is 1608902460899. The next prime is 1608902461007. The reversal of 1608902460965 is 5690642098061.

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 267794865121 + 1341107595844 = 517489^2 + 1158062^2 .

It is a cyclic number.

It is not a de Polignac number, because 1608902460965 - 2¹² = 1608902456869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1608902460965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160890246092 + ... + 160890246101.

It is an arithmetic number, because the mean of its divisors is an integer number (482670738291).

Almost surely, 2^{1608902460965} is an apocalyptic number.

It is an amenable number.

1608902460965 is a deficient number, since it is larger than the sum of its proper divisors (321780492199).

1608902460965 is an equidigital number, since it uses as much as digits as its factorization.

1608902460965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321780492198.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 1608902460965 in words is "one trillion, six hundred eight billion, nine hundred two million, four hundred sixty thousand, nine hundred sixty-five".