42530556555 has 24 divisors (see below), whose sum is σ = 77599613520. Its totient is φ = 21489122880.

The previous prime is 42530556529. The next prime is 42530556571. The reversal of 42530556555 is 55565503524.

42530556555 is a `hidden beast` number, since 4 + 2 + 5 + 30 + 5 + 565 + 55 = 666.

It is not a de Polignac number, because 42530556555 - 2¹⁰ = 42530555531 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42530556555.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 24870816 + ... + 24872525.

It is an arithmetic number, because the mean of its divisors is an integer number (3233317230).

Almost surely, 2^42530556555 is an apocalyptic number.

42530556555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42530556555 is a deficient number, since it is larger than the sum of its proper divisors (35069056965).

42530556555 is a wasteful number, since it uses less digits than its factorization.

42530556555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49743371 (or 49743368 counting only the distinct ones).

The product of its (nonzero) digits is 2250000, while the sum is 45.

The spelling of 42530556555 in words is "forty-two billion, five hundred thirty million, five hundred fifty-six thousand, five hundred fifty-five".