5531599691 has 4 divisors (see below), whose sum is σ = 5533090800. Its totient is φ = 5530108584.

The previous prime is 5531599673. The next prime is 5531599699. The reversal of 5531599691 is 1969951355.

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 5531599691 - 2⁶ = 5531599627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5531599699) 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, 739976 + ... + 747413.

It is an arithmetic number, because the mean of its divisors is an integer number (1383272700).

Almost surely, 2^5531599691 is an apocalyptic number.

5531599691 is a deficient number, since it is larger than the sum of its proper divisors (1491109).

5531599691 is a wasteful number, since it uses less digits than its factorization.

5531599691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491108.

The product of its digits is 1640250, while the sum is 53.

The square root of 5531599691 is about 74374.7248129363. The cubic root of 5531599691 is about 1768.5482569853.

The spelling of 5531599691 in words is "five billion, five hundred thirty-one million, five hundred ninety-nine thousand, six hundred ninety-one".