5611643947 has 8 divisors (see below), whose sum is σ = 6906638816. Its totient is φ = 4439981952.

The previous prime is 5611643911. The next prime is 5611643953. The reversal of 5611643947 is 7493461165.

5611643947 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 5611643947 - 2¹⁹ = 5611119659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5611643897 and 5611643906.

It is not an unprimeable number, because it can be changed into a prime (5611643647) 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, 30833118 + ... + 30833299.

It is an arithmetic number, because the mean of its divisors is an integer number (863329852).

Almost surely, 2^5611643947 is an apocalyptic number.

5611643947 is a deficient number, since it is larger than the sum of its proper divisors (1294994869).

5611643947 is a wasteful number, since it uses less digits than its factorization.

5611643947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61666437.

The product of its digits is 544320, while the sum is 46.

The square root of 5611643947 is about 74910.9067292607. The cubic root of 5611643947 is about 1777.0379498813.

The spelling of 5611643947 in words is "five billion, six hundred eleven million, six hundred forty-three thousand, nine hundred forty-seven".