10003955785 has 4 divisors (see below), whose sum is σ = 12004746948. Its totient is φ = 8003164624.

The previous prime is 10003955783. The next prime is 10003955789. The reversal of 10003955785 is 58755930001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58755930001 = 179 ⋅328245419.

It can be written as a sum of positive squares in 2 ways, for example, as 4181044921 + 5822910864 = 64661^2 + 76308^2 .

It is a cyclic number.

It is not a de Polignac number, because 10003955785 - 2¹ = 10003955783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10003955783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000395574 + ... + 1000395583.

It is an arithmetic number, because the mean of its divisors is an integer number (3001186737).

Almost surely, 2^10003955785 is an apocalyptic number.

It is an amenable number.

10003955785 is a deficient number, since it is larger than the sum of its proper divisors (2000791163).

10003955785 is an equidigital number, since it uses as much as digits as its factorization.

10003955785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000791162.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 10003955785 in words is "ten billion, three million, nine hundred fifty-five thousand, seven hundred eighty-five".