42054459890 has 16 divisors (see below), whose sum is σ = 75700391832. Its totient is φ = 16821258624.

The previous prime is 42054459847. The next prime is 42054459947. The reversal of 42054459890 is 9895445024.

It can be written as a sum of positive squares in 4 ways, for example, as 30092881729 + 11961578161 = 173473^2 + 109369^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515372 + ... + 591368.

Almost surely, 2^42054459890 is an apocalyptic number.

42054459890 is a deficient number, since it is larger than the sum of its proper divisors (33645931942).

42054459890 is a wasteful number, since it uses less digits than its factorization.

42054459890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131341.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 42054459890 in words is "forty-two billion, fifty-four million, four hundred fifty-nine thousand, eight hundred ninety".