4036181234561 has 4 divisors (see below), whose sum is σ = 4612778553792. Its totient is φ = 3459583915332.

The previous prime is 4036181234557. The next prime is 4036181234609. The reversal of 4036181234561 is 1654321816304.

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 4036181234561 - 2² = 4036181234557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4036181234551) 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, 288298659605 + ... + 288298659618.

It is an arithmetic number, because the mean of its divisors is an integer number (1153194638448).

Almost surely, 2^{4036181234561} is an apocalyptic number.

It is an amenable number.

4036181234561 is a deficient number, since it is larger than the sum of its proper divisors (576597319231).

4036181234561 is an equidigital number, since it uses as much as digits as its factorization.

4036181234561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576597319230.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 4036181234561 in words is "four trillion, thirty-six billion, one hundred eighty-one million, two hundred thirty-four thousand, five hundred sixty-one".