3485016781 has 4 divisors (see below), whose sum is σ = 3485521852. Its totient is φ = 3484511712.

The previous prime is 3485016767. The next prime is 3485016863. The reversal of 3485016781 is 1876105843.

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 693479556 + 2791537225 = 26334^2 + 52835^2 .

It is a cyclic number.

It is not a de Polignac number, because 3485016781 - 2¹¹ = 3485014733 is a prime.

It is a super-2 number, since 2×3485016781² = 24290683927703203922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3485016761) 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, 242040 + ... + 256033.

It is an arithmetic number, because the mean of its divisors is an integer number (871380463).

Almost surely, 2^3485016781 is an apocalyptic number.

It is an amenable number.

3485016781 is a deficient number, since it is larger than the sum of its proper divisors (505071).

3485016781 is an equidigital number, since it uses as much as digits as its factorization.

3485016781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505070.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 3485016781 is about 59034.0307026379. The cubic root of 3485016781 is about 1516.1248213339.

The spelling of 3485016781 in words is "three billion, four hundred eighty-five million, sixteen thousand, seven hundred eighty-one".