7961132549 has 2 divisors, whose sum is σ = 7961132550. Its totient is φ = 7961132548.

The previous prime is 7961132539. The next prime is 7961132573. The reversal of 7961132549 is 9452311697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7628799649 + 332332900 = 87343^2 + 18230^2 .

It is an emirp because it is prime and its reverse (9452311697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7961132549 - 2¹² = 7961128453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7961132539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3980566274 + 3980566275.

It is an arithmetic number, because the mean of its divisors is an integer number (3980566275).

Almost surely, 2^7961132549 is an apocalyptic number.

It is an amenable number.

7961132549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7961132549 is an equidigital number, since it uses as much as digits as its factorization.

7961132549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 47.

The square root of 7961132549 is about 89225.1788958700. The cubic root of 7961132549 is about 1996.7557861336.

The spelling of 7961132549 in words is "seven billion, nine hundred sixty-one million, one hundred thirty-two thousand, five hundred forty-nine".