7671749549 has 2 divisors, whose sum is σ = 7671749550. Its totient is φ = 7671749548.

The previous prime is 7671749509. The next prime is 7671749597. The reversal of 7671749549 is 9459471767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6994813225 + 676936324 = 83635^2 + 26018^2 .

It is a cyclic number.

It is not a de Polignac number, because 7671749549 - 2¹² = 7671745453 is a prime.

It is a super-2 number, since 2×7671749549² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7671749509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3835874774 + 3835874775.

It is an arithmetic number, because the mean of its divisors is an integer number (3835874775).

Almost surely, 2^7671749549 is an apocalyptic number.

It is an amenable number.

7671749549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7671749549 is an equidigital number, since it uses as much as digits as its factorization.

7671749549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13335840, while the sum is 59.

The square root of 7671749549 is about 87588.5240713645. The cubic root of 7671749549 is about 1972.2629006983.

The spelling of 7671749549 in words is "seven billion, six hundred seventy-one million, seven hundred forty-nine thousand, five hundred forty-nine".