6144868561 has 12 divisors (see below), whose sum is σ = 6663531420. Its totient is φ = 5663985600.

The previous prime is 6144868553. The next prime is 6144868579. The reversal of 6144868561 is 1658684416.

It can be written as a sum of positive squares in 6 ways, for example, as 943718400 + 5201150161 = 30720^2 + 72119^2 .

It is not a de Polignac number, because 6144868561 - 2³ = 6144868553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6144868511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92535 + ... + 144403.

It is an arithmetic number, because the mean of its divisors is an integer number (555294285).

Almost surely, 2^6144868561 is an apocalyptic number.

It is an amenable number.

6144868561 is a deficient number, since it is larger than the sum of its proper divisors (518662859).

6144868561 is a wasteful number, since it uses less digits than its factorization.

6144868561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52596 (or 52583 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The square root of 6144868561 is about 78389.2120192568. The cubic root of 6144868561 is about 1831.6290908023.

The spelling of 6144868561 in words is "six billion, one hundred forty-four million, eight hundred sixty-eight thousand, five hundred sixty-one".