42045454561 has 16 divisors (see below), whose sum is σ = 48591990720. Its totient is φ = 35955374080.

The previous prime is 42045454523. The next prime is 42045454601. The reversal of 42045454561 is 16545454024.

It is a cyclic number.

It is not a de Polignac number, because 42045454561 - 2⁹ = 42045454049 is a prime.

It is a super-2 number, since 2×42045454561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42045454501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293730 + ... + 412756.

It is an arithmetic number, because the mean of its divisors is an integer number (3036999420).

Almost surely, 2^42045454561 is an apocalyptic number.

It is an amenable number.

42045454561 is a deficient number, since it is larger than the sum of its proper divisors (6546536159).

42045454561 is a wasteful number, since it uses less digits than its factorization.

42045454561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120944.

The product of its (nonzero) digits is 384000, while the sum is 40.

The spelling of 42045454561 in words is "forty-two billion, forty-five million, four hundred fifty-four thousand, five hundred sixty-one".