8541909250561 has 8 divisors (see below), whose sum is σ = 9045205293960. Its totient is φ = 8038705517568.

The previous prime is 8541909250543. The next prime is 8541909250579. The reversal of 8541909250561 is 1650529091458.

It is an interprime number because it is at equal distance from previous prime (8541909250543) and next prime (8541909250579).

It can be written as a sum of positive squares in 4 ways, for example, as 16064041536 + 8525845209025 = 126744^2 + 2919905^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8541909250561 - 2¹⁷ = 8541909119489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8541909250531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22887036 + ... + 23257261.

It is an arithmetic number, because the mean of its divisors is an integer number (1130650661745).

Almost surely, 2^{8541909250561} is an apocalyptic number.

It is an amenable number.

8541909250561 is a deficient number, since it is larger than the sum of its proper divisors (503296043399).

8541909250561 is a wasteful number, since it uses less digits than its factorization.

8541909250561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46155203.

The product of its (nonzero) digits is 3888000, while the sum is 55.

The spelling of 8541909250561 in words is "eight trillion, five hundred forty-one billion, nine hundred nine million, two hundred fifty thousand, five hundred sixty-one".