5559999991 has 16 divisors (see below), whose sum is σ = 7245612864. Its totient is φ = 4140347904.

The previous prime is 5559999983. The next prime is 5560000003. The reversal of 5559999991 is 1999999555.

It is not a de Polignac number, because 5559999991 - 2³ = 5559999983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5559999991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5559999941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1795480 + ... + 1798573.

It is an arithmetic number, because the mean of its divisors is an integer number (452850804).

Almost surely, 2^5559999991 is an apocalyptic number.

5559999991 is a deficient number, since it is larger than the sum of its proper divisors (1685612873).

5559999991 is a wasteful number, since it uses less digits than its factorization.

5559999991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594090.

The product of its digits is 66430125, while the sum is 70.

The square root of 5559999991 is about 74565.4074688793. The cubic root of 5559999991 is about 1771.5697811571.

The spelling of 5559999991 in words is "five billion, five hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".