42493808578 has 16 divisors (see below), whose sum is σ = 69323490936. Its totient is φ = 19418342400.

The previous prime is 42493808561. The next prime is 42493808587. The reversal of 42493808578 is 87580839424.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41443594929 + 1050213649 = 203577^2 + 32407^2 .

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 7 ways as a sum of consecutive naturals, for example, 8088351 + ... + 8093602.

Almost surely, 2^42493808578 is an apocalyptic number.

42493808578 is a deficient number, since it is larger than the sum of its proper divisors (26829682358).

42493808578 is a wasteful number, since it uses less digits than its factorization.

42493808578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16182069.

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 42493808578 in words is "forty-two billion, four hundred ninety-three million, eight hundred eight thousand, five hundred seventy-eight".