1613064042721 has 8 divisors (see below), whose sum is σ = 1619594331264. Its totient is φ = 1606534578000.

The previous prime is 1613064042659. The next prime is 1613064042827. The reversal of 1613064042721 is 1272404603161.

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

It is a cyclic number.

It is not a de Polignac number, because 1613064042721 - 2²³ = 1613055654113 is a prime.

It is a super-2 number, since 2×1613064042721² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613064045721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3881800 + ... + 4277206.

It is an arithmetic number, because the mean of its divisors is an integer number (202449291408).

Almost surely, 2^{1613064042721} is an apocalyptic number.

It is an amenable number.

1613064042721 is a deficient number, since it is larger than the sum of its proper divisors (6530288543).

1613064042721 is a wasteful number, since it uses less digits than its factorization.

1613064042721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411911.

The product of its (nonzero) digits is 48384, while the sum is 37.

Adding to 1613064042721 its reverse (1272404603161), we get a palindrome (2885468645882).

The spelling of 1613064042721 in words is "one trillion, six hundred thirteen billion, sixty-four million, forty-two thousand, seven hundred twenty-one".