542668139520 has 440 divisors, whose sum is σ = 1881845976624. Its totient is φ = 133471862784.

The previous prime is 542668139491. The next prime is 542668139527. The reversal of 542668139520 is 25931866245.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (542668139527) 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 39 ways as a sum of consecutive naturals, for example, 438696342 + ... + 438697578.

Almost surely, 2^542668139520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542668139520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940922988312).

542668139520 is an abundant number, since it is smaller than the sum of its proper divisors (1339177837104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542668139520 is an equidigital number, since it uses as much as digits as its factorization.

542668139520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317 (or 1260 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 542668139520 in words is "five hundred forty-two billion, six hundred sixty-eight million, one hundred thirty-nine thousand, five hundred twenty".