4056542506561 has 16 divisors (see below), whose sum is σ = 4195854305280. Its totient is φ = 3919494574800.

The previous prime is 4056542506481. The next prime is 4056542506619. The reversal of 4056542506561 is 1656052456504.

4056542506561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 4056542506561 - 2¹⁵ = 4056542473793 is a prime.

It is a super-4 number, since 4×4056542506561⁴ (a number of 52 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4056542506661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244806 + ... + 2858848.

It is an arithmetic number, because the mean of its divisors is an integer number (262240894080).

Almost surely, 2^{4056542506561} is an apocalyptic number.

It is an amenable number.

4056542506561 is a deficient number, since it is larger than the sum of its proper divisors (139311798719).

4056542506561 is a wasteful number, since it uses less digits than its factorization.

4056542506561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614476.

The product of its (nonzero) digits is 4320000, while the sum is 49.

The spelling of 4056542506561 in words is "four trillion, fifty-six billion, five hundred forty-two million, five hundred six thousand, five hundred sixty-one".