542667156849 has 20 divisors (see below), whose sum is σ = 838604422260. Its totient is φ = 349302996000.

The previous prime is 542667156799. The next prime is 542667156851. The reversal of 542667156849 is 948651766245.

542667156849 is a `hidden beast` number, since 5 + 4 + 2 + 6 + 67 + 1 + 568 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 339356346849 + 203310810000 = 582543^2 + 450900^2 .

It is not a de Polignac number, because 542667156849 - 2¹⁷ = 542667025777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (542667156349) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 115507902 + ... + 115512599.

It is an arithmetic number, because the mean of its divisors is an integer number (41930221113).

Almost surely, 2^542667156849 is an apocalyptic number.

It is an amenable number.

542667156849 is a deficient number, since it is larger than the sum of its proper divisors (295937265411).

542667156849 is a wasteful number, since it uses less digits than its factorization.

542667156849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231020542 (or 231020533 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 542667156849 in words is "five hundred forty-two billion, six hundred sixty-seven million, one hundred fifty-six thousand, eight hundred forty-nine".