4123561018 has 4 divisors (see below), whose sum is σ = 6185341530. Its totient is φ = 2061780508.

The previous prime is 4123560979. The next prime is 4123561061. The reversal of 4123561018 is 8101653214.

4123561018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 2115356049 + 2008204969 = 45993^2 + 44813^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030890253 + ... + 1030890256.

Almost surely, 2^4123561018 is an apocalyptic number.

4123561018 is a deficient number, since it is larger than the sum of its proper divisors (2061780512).

4123561018 is a wasteful number, since it uses less digits than its factorization.

4123561018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061780511.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 4123561018 is about 64214.9594565005. The cubic root of 4123561018 is about 1603.5806550595.

The spelling of 4123561018 in words is "four billion, one hundred twenty-three million, five hundred sixty-one thousand, eighteen".