8561197141 has 6 divisors (see below), whose sum is σ = 9958943670. Its totient is φ = 7338168936.

The previous prime is 8561197081. The next prime is 8561197147. The reversal of 8561197141 is 1417911658.

It can be written as a sum of positive squares in only one way, i.e., 5203458225 + 3357738916 = 72135^2 + 57946^2 .

It is not a de Polignac number, because 8561197141 - 2⁷ = 8561197013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8561197147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87359106 + ... + 87359203.

It is an arithmetic number, because the mean of its divisors is an integer number (1659823945).

Almost surely, 2^8561197141 is an apocalyptic number.

It is an amenable number.

8561197141 is a deficient number, since it is larger than the sum of its proper divisors (1397746529).

8561197141 is a wasteful number, since it uses less digits than its factorization.

8561197141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174718323 (or 174718316 counting only the distinct ones).

The product of its digits is 60480, while the sum is 43.

The square root of 8561197141 is about 92526.7374384291. The cubic root of 8561197141 is about 2045.7136009894.

The spelling of 8561197141 in words is "eight billion, five hundred sixty-one million, one hundred ninety-seven thousand, one hundred forty-one".