5591819971 has 4 divisors (see below), whose sum is σ = 5710794912. Its totient is φ = 5472845032.

The previous prime is 5591819921. The next prime is 5591819977. The reversal of 5591819971 is 1799181955.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5591819971 - 2²¹ = 5589722819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5591819977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59487400 + ... + 59487493.

It is an arithmetic number, because the mean of its divisors is an integer number (1427698728).

Almost surely, 2^5591819971 is an apocalyptic number.

5591819971 is a deficient number, since it is larger than the sum of its proper divisors (118974941).

5591819971 is a wasteful number, since it uses less digits than its factorization.

5591819971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118974940.

The product of its digits is 1020600, while the sum is 55.

The square root of 5591819971 is about 74778.4726442042. The cubic root of 5591819971 is about 1774.9429296998.

The spelling of 5591819971 in words is "five billion, five hundred ninety-one million, eight hundred nineteen thousand, nine hundred seventy-one".