42549478506 has 24 divisors (see below), whose sum is σ = 92201300100. Its totient is φ = 14181503616.

The previous prime is 42549478501. The next prime is 42549478523. The reversal of 42549478506 is 60587494524.

42549478506 is a `hidden beast` number, since 4 + 2 + 549 + 47 + 8 + 50 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40563974025 + 1985504481 = 201405^2 + 44559^2 .

It is a super-2 number, since 2×42549478506² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42549478501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25716 + ... + 292848.

Almost surely, 2^42549478506 is an apocalyptic number.

42549478506 is an abundant number, since it is smaller than the sum of its proper divisors (49651821594).

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

42549478506 is a wasteful number, since it uses less digits than its factorization.

42549478506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275990 (or 275987 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 42549478506 in words is "forty-two billion, five hundred forty-nine million, four hundred seventy-eight thousand, five hundred six".