6861437617 has 8 divisors (see below), whose sum is σ = 7046334792. Its totient is φ = 6677376000.

The previous prime is 6861437599. The next prime is 6861437647. The reversal of 6861437617 is 7167341686.

It can be written as a sum of positive squares in 4 ways, for example, as 3304985121 + 3556452496 = 57489^2 + 59636^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6861437617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6861437647) 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, 192228 + ... + 225109.

It is an arithmetic number, because the mean of its divisors is an integer number (880791849).

Almost surely, 2^6861437617 is an apocalyptic number.

It is an amenable number.

6861437617 is a deficient number, since it is larger than the sum of its proper divisors (184897175).

6861437617 is a wasteful number, since it uses less digits than its factorization.

6861437617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417779.

The product of its digits is 1016064, while the sum is 49.

The square root of 6861437617 is about 82833.7951382164. The cubic root of 6861437617 is about 1900.2250533970.

The spelling of 6861437617 in words is "six billion, eight hundred sixty-one million, four hundred thirty-seven thousand, six hundred seventeen".