8747441561 has 2 divisors, whose sum is σ = 8747441562. Its totient is φ = 8747441560.

The previous prime is 8747441537. The next prime is 8747441569. The reversal of 8747441561 is 1651447478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6027193225 + 2720248336 = 77635^2 + 52156^2 .

It is a cyclic number.

It is not a de Polignac number, because 8747441561 - 2¹⁸ = 8747179417 is a prime.

It is a super-2 number, since 2×8747441561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8747441569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4373720780 + 4373720781.

It is an arithmetic number, because the mean of its divisors is an integer number (4373720781).

Almost surely, 2^8747441561 is an apocalyptic number.

It is an amenable number.

8747441561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8747441561 is an equidigital number, since it uses as much as digits as its factorization.

8747441561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752640, while the sum is 47.

The square root of 8747441561 is about 93527.7582378622. The cubic root of 8747441561 is about 2060.4417911447.

The spelling of 8747441561 in words is "eight billion, seven hundred forty-seven million, four hundred forty-one thousand, five hundred sixty-one".