7561551169 has 2 divisors, whose sum is σ = 7561551170. Its totient is φ = 7561551168.

The previous prime is 7561551167. The next prime is 7561551199. The reversal of 7561551169 is 9611551657.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7552479025 + 9072144 = 86905^2 + 3012^2 .

It is a cyclic number.

It is not a de Polignac number, because 7561551169 - 2¹ = 7561551167 is a prime.

It is a super-2 number, since 2×7561551169² (a number of 21 digits) contains 22 as substring.

Together with 7561551167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7561551167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3780775584 + 3780775585.

It is an arithmetic number, because the mean of its divisors is an integer number (3780775585).

Almost surely, 2^7561551169 is an apocalyptic number.

It is an amenable number.

7561551169 is a deficient number, since it is larger than the sum of its proper divisors (1).

7561551169 is an equidigital number, since it uses as much as digits as its factorization.

7561551169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 283500, while the sum is 46.

The square root of 7561551169 is about 86957.1800888230. The cubic root of 7561551169 is about 1962.7740091203.

The spelling of 7561551169 in words is "seven billion, five hundred sixty-one million, five hundred fifty-one thousand, one hundred sixty-nine".