542061565641 has 16 divisors (see below), whose sum is σ = 810850817920. Its totient is φ = 357865886160.

The previous prime is 542061565613. The next prime is 542061565679. The reversal of 542061565641 is 146565160245.

542061565641 is a `hidden beast` number, since 5 + 4 + 20 + 6 + 1 + 565 + 64 + 1 = 666.

It is not a de Polignac number, because 542061565641 - 2¹⁷ = 542061434569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542061560641) 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, 97455250 + ... + 97460811.

It is an arithmetic number, because the mean of its divisors is an integer number (50678176120).

Almost surely, 2^542061565641 is an apocalyptic number.

It is an amenable number.

542061565641 is a deficient number, since it is larger than the sum of its proper divisors (268789252279).

542061565641 is a wasteful number, since it uses less digits than its factorization.

542061565641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194916173 (or 194916167 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 542061565641 in words is "five hundred forty-two billion, sixty-one million, five hundred sixty-five thousand, six hundred forty-one".