42554545561 has 32 divisors (see below), whose sum is σ = 49491832320. Its totient is φ = 36234604800.

The previous prime is 42554545547. The next prime is 42554545591. The reversal of 42554545561 is 16554545524.

It is a cyclic number.

It is not a de Polignac number, because 42554545561 - 2⁹ = 42554545049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42554545541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1148635 + ... + 1185103.

It is an arithmetic number, because the mean of its divisors is an integer number (1546619760).

Almost surely, 2^42554545561 is an apocalyptic number.

It is an amenable number.

42554545561 is a deficient number, since it is larger than the sum of its proper divisors (6937286759).

42554545561 is a wasteful number, since it uses less digits than its factorization.

42554545561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36625.

The product of its digits is 2400000, while the sum is 46.

The spelling of 42554545561 in words is "forty-two billion, five hundred fifty-four million, five hundred forty-five thousand, five hundred sixty-one".