145635220985 has 8 divisors (see below), whose sum is σ = 185042398536. Its totient is φ = 109654754560.

The previous prime is 145635220963. The next prime is 145635220999. The reversal of 145635220985 is 589022536541.

145635220985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 51479525881 + 94155695104 = 226891^2 + 306848^2 .

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

It is not a de Polignac number, because 145635220985 - 2⁸ = 145635220729 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 856677686 + ... + 856677855.

It is an arithmetic number, because the mean of its divisors is an integer number (23130299817).

Almost surely, 2^145635220985 is an apocalyptic number.

It is an amenable number.

145635220985 is a deficient number, since it is larger than the sum of its proper divisors (39407177551).

145635220985 is a wasteful number, since it uses less digits than its factorization.

145635220985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713355563.

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 145635220985 in words is "one hundred forty-five billion, six hundred thirty-five million, two hundred twenty thousand, nine hundred eighty-five".