542044541661 has 16 divisors (see below), whose sum is σ = 826174272000. Its totient is φ = 309664124208.

The previous prime is 542044541617. The next prime is 542044541693. The reversal of 542044541661 is 166145440245.

It is a happy number.

It is not a de Polignac number, because 542044541661 - 2¹⁰ = 542044540637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542044543661) 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, 3062451 + ... + 3234608.

It is an arithmetic number, because the mean of its divisors is an integer number (51635892000).

Almost surely, 2^542044541661 is an apocalyptic number.

It is an amenable number.

542044541661 is a deficient number, since it is larger than the sum of its proper divisors (284129730339).

542044541661 is a wasteful number, since it uses less digits than its factorization.

542044541661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6301168.

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 542044541661 in words is "five hundred forty-two billion, forty-four million, five hundred forty-one thousand, six hundred sixty-one".