3613342781 has 8 divisors (see below), whose sum is σ = 3713198424. Its totient is φ = 3513602880.

The previous prime is 3613342753. The next prime is 3613342801. The reversal of 3613342781 is 1872433163.

It can be written as a sum of positive squares in 4 ways, for example, as 33235225 + 3580107556 = 5765^2 + 59834^2 .

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

It is not a de Polignac number, because 3613342781 - 2¹⁰ = 3613341757 is a prime.

It is a super-4 number, since 4×3613342781⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3613042781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36371 + ... + 92463.

It is an arithmetic number, because the mean of its divisors is an integer number (464149803).

Almost surely, 2^3613342781 is an apocalyptic number.

It is an amenable number.

3613342781 is a deficient number, since it is larger than the sum of its proper divisors (99855643).

3613342781 is a wasteful number, since it uses less digits than its factorization.

3613342781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57871.

The product of its digits is 72576, while the sum is 38.

The square root of 3613342781 is about 60111.0870056431. The cubic root of 3613342781 is about 1534.5099930929.

The spelling of 3613342781 in words is "three billion, six hundred thirteen million, three hundred forty-two thousand, seven hundred eighty-one".