5641377721 has 8 divisors (see below), whose sum is σ = 6447795840. Its totient is φ = 4835086368.

The previous prime is 5641377713. The next prime is 5641377727. The reversal of 5641377721 is 1277731465.

It is a happy number.

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

It is not a de Polignac number, because 5641377721 - 2³ = 5641377713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5641377727) 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, 100380 + ... + 146146.

It is an arithmetic number, because the mean of its divisors is an integer number (805974480).

Almost surely, 2^5641377721 is an apocalyptic number.

It is an amenable number.

5641377721 is a deficient number, since it is larger than the sum of its proper divisors (806418119).

5641377721 is a wasteful number, since it uses less digits than its factorization.

5641377721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63383.

The product of its digits is 246960, while the sum is 43.

The square root of 5641377721 is about 75109.1054466767. The cubic root of 5641377721 is about 1780.1710184756.

The spelling of 5641377721 in words is "five billion, six hundred forty-one million, three hundred seventy-seven thousand, seven hundred twenty-one".