420451505454042 has 24 divisors (see below), whose sum is σ = 923457416091444. Its totient is φ = 138230631929664.

The previous prime is 420451505454007. The next prime is 420451505454061. The reversal of 420451505454042 is 240454505154024.

420451505454042 is a `hidden beast` number, since 4 + 2 + 0 + 4 + 5 + 1 + 50 + 54 + 540 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 409909788720441 + 10541716733601 = 20246229^2 + 3246801^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159989156013 + ... + 159989158640.

Almost surely, 2^{420451505454042} is an apocalyptic number.

420451505454042 is an abundant number, since it is smaller than the sum of its proper divisors (503005910637402).

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

420451505454042 is a wasteful number, since it uses less digits than its factorization.

420451505454042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319978314734 (or 319978314731 counting only the distinct ones).

The product of its (nonzero) digits is 2560000, while the sum is 45.

The spelling of 420451505454042 in words is "four hundred twenty trillion, four hundred fifty-one billion, five hundred five million, four hundred fifty-four thousand, forty-two".