8675556117521 has 2 divisors, whose sum is σ = 8675556117522. Its totient is φ = 8675556117520.

The previous prime is 8675556117461. The next prime is 8675556117617. The reversal of 8675556117521 is 1257116555768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7588708167121 + 1086847950400 = 2754761^2 + 1042520^2 .

It is a cyclic number.

It is not a de Polignac number, because 8675556117521 - 2¹⁸ = 8675555855377 is a prime.

It is not a weakly prime, because it can be changed into another prime (8675556117721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4337778058760 + 4337778058761.

It is an arithmetic number, because the mean of its divisors is an integer number (4337778058761).

Almost surely, 2^{8675556117521} is an apocalyptic number.

It is an amenable number.

8675556117521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8675556117521 is an equidigital number, since it uses as much as digits as its factorization.

8675556117521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640000, while the sum is 59.

The spelling of 8675556117521 in words is "eight trillion, six hundred seventy-five billion, five hundred fifty-six million, one hundred seventeen thousand, five hundred twenty-one".