5641377661 has 8 divisors (see below), whose sum is σ = 5752555424. Its totient is φ = 5530803120.

The previous prime is 5641377659. The next prime is 5641377691. The reversal of 5641377661 is 1667731465.

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 5641377661 - 2¹ = 5641377659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5641377691) 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, 131895 + ... + 169348.

It is an arithmetic number, because the mean of its divisors is an integer number (719069428).

Almost surely, 2^5641377661 is an apocalyptic number.

It is an amenable number.

5641377661 is a deficient number, since it is larger than the sum of its proper divisors (111177763).

5641377661 is a wasteful number, since it uses less digits than its factorization.

5641377661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301611.

The product of its digits is 635040, while the sum is 46.

The square root of 5641377661 is about 75109.1050472578. The cubic root of 5641377661 is about 1780.1710121645.

The spelling of 5641377661 in words is "five billion, six hundred forty-one million, three hundred seventy-seven thousand, six hundred sixty-one".