8461628840569 has 2 divisors, whose sum is σ = 8461628840570. Its totient is φ = 8461628840568.

The previous prime is 8461628840551. The next prime is 8461628840573. The reversal of 8461628840569 is 9650488261648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7282916921344 + 1178711919225 = 2698688^2 + 1085685^2 .

It is a cyclic number.

It is not a de Polignac number, because 8461628840569 - 2¹⁷ = 8461628709497 is a prime.

It is a super-2 number, since 2×8461628840569² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8461628847569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4230814420284 + 4230814420285.

It is an arithmetic number, because the mean of its divisors is an integer number (4230814420285).

Almost surely, 2^{8461628840569} is an apocalyptic number.

It is an amenable number.

8461628840569 is a deficient number, since it is larger than the sum of its proper divisors (1).

8461628840569 is an equidigital number, since it uses as much as digits as its factorization.

8461628840569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 159252480, while the sum is 67.

The spelling of 8461628840569 in words is "eight trillion, four hundred sixty-one billion, six hundred twenty-eight million, eight hundred forty thousand, five hundred sixty-nine".