420426851409 has 32 divisors (see below), whose sum is σ = 640857329280. Its totient is φ = 272243577600.

The previous prime is 420426851381. The next prime is 420426851419. The reversal of 420426851409 is 904158624024.

It is a happy number.

420426851409 is a `hidden beast` number, since 4 + 2 + 0 + 426 + 85 + 140 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-420426851409 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (420426851419) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 585252 + ... + 1087829.

It is an arithmetic number, because the mean of its divisors is an integer number (20026791540).

Almost surely, 2^420426851409 is an apocalyptic number.

It is an amenable number.

420426851409 is a deficient number, since it is larger than the sum of its proper divisors (220430477871).

420426851409 is a wasteful number, since it uses less digits than its factorization.

420426851409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673358 (or 1673352 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 420426851409 in words is "four hundred twenty billion, four hundred twenty-six million, eight hundred fifty-one thousand, four hundred nine".