42540506258 has 4 divisors (see below), whose sum is σ = 63810759390. Its totient is φ = 21270253128.

The previous prime is 42540506251. The next prime is 42540506269. The reversal of 42540506258 is 85260504524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25378720249 + 17161786009 = 159307^2 + 131003^2 .

It is not an unprimeable number, because it can be changed into a prime (42540506251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10635126563 + ... + 10635126566.

Almost surely, 2^42540506258 is an apocalyptic number.

42540506258 is a deficient number, since it is larger than the sum of its proper divisors (21270253132).

42540506258 is a wasteful number, since it uses less digits than its factorization.

42540506258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21270253131.

The product of its (nonzero) digits is 384000, while the sum is 41.

The spelling of 42540506258 in words is "forty-two billion, five hundred forty million, five hundred six thousand, two hundred fifty-eight".