8671645061 has 4 divisors (see below), whose sum is σ = 8781412800. Its totient is φ = 8561877324.

The previous prime is 8671645051. The next prime is 8671645067. The reversal of 8671645061 is 1605461768.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8671645061 - 2¹⁸ = 8671382917 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 (8671645067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54883751 + ... + 54883908.

It is an arithmetic number, because the mean of its divisors is an integer number (2195353200).

Almost surely, 2^8671645061 is an apocalyptic number.

It is an amenable number.

8671645061 is a deficient number, since it is larger than the sum of its proper divisors (109767739).

8671645061 is a wasteful number, since it uses less digits than its factorization.

8671645061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109767738.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 8671645061 is about 93121.6680531443. The cubic root of 8671645061 is about 2054.4732824442.

The spelling of 8671645061 in words is "eight billion, six hundred seventy-one million, six hundred forty-five thousand, sixty-one".