1635666265345 has 16 divisors (see below), whose sum is σ = 2249664018048. Its totient is φ = 1118367440640.

The previous prime is 1635666265313. The next prime is 1635666265369. The reversal of 1635666265345 is 5435626665361.

It is not a de Polignac number, because 1635666265345 - 2⁵ = 1635666265313 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 1635666265345.

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, 67326936 + ... + 67351225.

It is an arithmetic number, because the mean of its divisors is an integer number (140604001128).

Almost surely, 2^{1635666265345} is an apocalyptic number.

It is an amenable number.

1635666265345 is a deficient number, since it is larger than the sum of its proper divisors (613997752703).

1635666265345 is a wasteful number, since it uses less digits than its factorization.

1635666265345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134678520.

The product of its digits is 69984000, while the sum is 58.

The spelling of 1635666265345 in words is "one trillion, six hundred thirty-five billion, six hundred sixty-six million, two hundred sixty-five thousand, three hundred forty-five".