42549478497 has 16 divisors (see below), whose sum is σ = 64225630080. Its totient is φ = 27831104496.

The previous prime is 42549478463. The next prime is 42549478501. The reversal of 42549478497 is 79487494524.

42549478497 is a `hidden beast` number, since 4 + 2 + 54 + 94 + 7 + 8 + 497 = 666.

It is not a de Polignac number, because 42549478497 - 2⁷ = 42549478369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42549478297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14865613 + ... + 14868474.

It is an arithmetic number, because the mean of its divisors is an integer number (4014101880).

Almost surely, 2^42549478497 is an apocalyptic number.

It is an amenable number.

42549478497 is a deficient number, since it is larger than the sum of its proper divisors (21676151583).

42549478497 is a wasteful number, since it uses less digits than its factorization.

42549478497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29734149 (or 29734143 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 42549478497 in words is "forty-two billion, five hundred forty-nine million, four hundred seventy-eight thousand, four hundred ninety-seven".