87745289748569 has 2 divisors, whose sum is σ = 87745289748570. Its totient is φ = 87745289748568.

The previous prime is 87745289748527. The next prime is 87745289748581. The reversal of 87745289748569 is 96584798254778.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68282325209344 + 19462964539225 = 8263312^2 + 4411685^2 .

It is a cyclic number.

It is not a de Polignac number, because 87745289748569 - 2²⁸ = 87745021313113 is a prime.

It is a super-2 number, since 2×87745289748569² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87745289748509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43872644874284 + 43872644874285.

It is an arithmetic number, because the mean of its divisors is an integer number (43872644874285).

Almost surely, 2^{87745289748569} is an apocalyptic number.

It is an amenable number.

87745289748569 is a deficient number, since it is larger than the sum of its proper divisors (1).

87745289748569 is an equidigital number, since it uses as much as digits as its factorization.

87745289748569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68279500800, while the sum is 89.

The spelling of 87745289748569 in words is "eighty-seven trillion, seven hundred forty-five billion, two hundred eighty-nine million, seven hundred forty-eight thousand, five hundred sixty-nine".