5591537685 has 24 divisors (see below), whose sum is σ = 9697520664. Its totient is φ = 2980454400.

The previous prime is 5591537681. The next prime is 5591537687. The reversal of 5591537685 is 5867351955.

5591537685 is a `hidden beast` number, since 559 + 1 + 5 + 3 + 7 + 6 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 47692836 + 5543844849 = 6906^2 + 74457^2 .

It is not a de Polignac number, because 5591537685 - 2² = 5591537681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5591537681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46549 + ... + 115541.

It is an arithmetic number, because the mean of its divisors is an integer number (404063361).

Almost surely, 2^5591537685 is an apocalyptic number.

It is an amenable number.

5591537685 is a deficient number, since it is larger than the sum of its proper divisors (4105982979).

5591537685 is a wasteful number, since it uses less digits than its factorization.

5591537685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70805 (or 70802 counting only the distinct ones).

The product of its digits is 5670000, while the sum is 54.

The square root of 5591537685 is about 74776.5851386649. The cubic root of 5591537685 is about 1774.9130616680.

The spelling of 5591537685 in words is "five billion, five hundred ninety-one million, five hundred thirty-seven thousand, six hundred eighty-five".