6123665641 has 4 divisors (see below), whose sum is σ = 6149075284. Its totient is φ = 6098256000.

The previous prime is 6123665599. The next prime is 6123665657. The reversal of 6123665641 is 1465663216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3306710016 + 2816955625 = 57504^2 + 53075^2 .

It is a cyclic number.

It is not a de Polignac number, because 6123665641 - 2¹⁷ = 6123534569 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6123665594 and 6123665603.

It is not an unprimeable number, because it can be changed into a prime (6123605641) 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, 12704460 + ... + 12704941.

It is an arithmetic number, because the mean of its divisors is an integer number (1537268821).

Almost surely, 2^6123665641 is an apocalyptic number.

It is an amenable number.

6123665641 is a deficient number, since it is larger than the sum of its proper divisors (25409643).

6123665641 is a wasteful number, since it uses less digits than its factorization.

6123665641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25409642.

The product of its digits is 155520, while the sum is 40.

The square root of 6123665641 is about 78253.8538412007. The cubic root of 6123665641 is about 1829.5199793072.

The spelling of 6123665641 in words is "six billion, one hundred twenty-three million, six hundred sixty-five thousand, six hundred forty-one".