5571812749 has 2 divisors, whose sum is σ = 5571812750. Its totient is φ = 5571812748.

The previous prime is 5571812723. The next prime is 5571812761. The reversal of 5571812749 is 9472181755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5443783524 + 128029225 = 73782^2 + 11315^2 .

It is a cyclic number.

It is not a de Polignac number, because 5571812749 - 2²⁹ = 5034941837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5571810749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2785906374 + 2785906375.

It is an arithmetic number, because the mean of its divisors is an integer number (2785906375).

Almost surely, 2^5571812749 is an apocalyptic number.

It is an amenable number.

5571812749 is a deficient number, since it is larger than the sum of its proper divisors (1).

5571812749 is an equidigital number, since it uses as much as digits as its factorization.

5571812749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 49.

The square root of 5571812749 is about 74644.5761525913. The cubic root of 5571812749 is about 1772.8235174904.

The spelling of 5571812749 in words is "five billion, five hundred seventy-one million, eight hundred twelve thousand, seven hundred forty-nine".