542405656530 has 160 divisors (see below), whose sum is σ = 1562869655424. Its totient is φ = 134492742144.

The previous prime is 542405656511. The next prime is 542405656571. The reversal of 542405656530 is 35656504245.

542405656530 is a `hidden beast` number, since 5 + 4 + 2 + 4 + 0 + 56 + 565 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 905619 + ... + 1380201.

Almost surely, 2^542405656530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542405656530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781434827712).

542405656530 is an abundant number, since it is smaller than the sum of its proper divisors (1020463998894).

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

542405656530 is a wasteful number, since it uses less digits than its factorization.

542405656530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474702 (or 474693 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 45.

The spelling of 542405656530 in words is "five hundred forty-two billion, four hundred five million, six hundred fifty-six thousand, five hundred thirty".