5721261641 has 4 divisors (see below), whose sum is σ = 5875890372. Its totient is φ = 5566632912.

The previous prime is 5721261613. The next prime is 5721261653. The reversal of 5721261641 is 1461621275.

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 3436421641 + 2284840000 = 58621^2 + 47800^2 .

It is a cyclic number.

It is not a de Polignac number, because 5721261641 - 2⁶ = 5721261577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5721261041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77314310 + ... + 77314383.

It is an arithmetic number, because the mean of its divisors is an integer number (1468972593).

Almost surely, 2^5721261641 is an apocalyptic number.

It is an amenable number.

5721261641 is a deficient number, since it is larger than the sum of its proper divisors (154628731).

5721261641 is a wasteful number, since it uses less digits than its factorization.

5721261641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154628730.

The product of its digits is 20160, while the sum is 35.

The square root of 5721261641 is about 75639.0219463472. The cubic root of 5721261641 is about 1788.5342849961.

The spelling of 5721261641 in words is "five billion, seven hundred twenty-one million, two hundred sixty-one thousand, six hundred forty-one".