5631540709 has 4 divisors (see below), whose sum is σ = 5762506816. Its totient is φ = 5500574604.

The previous prime is 5631540661. The next prime is 5631540713. The reversal of 5631540709 is 9070451365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5631540709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5631540779) 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, 65482989 + ... + 65483074.

It is an arithmetic number, because the mean of its divisors is an integer number (1440626704).

Almost surely, 2^5631540709 is an apocalyptic number.

It is an amenable number.

5631540709 is a deficient number, since it is larger than the sum of its proper divisors (130966107).

5631540709 is a wasteful number, since it uses less digits than its factorization.

5631540709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130966106.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 5631540709 is about 75043.5920582164. The cubic root of 5631540709 is about 1779.1357068396.

The spelling of 5631540709 in words is "five billion, six hundred thirty-one million, five hundred forty thousand, seven hundred nine".