431654720402 has 16 divisors (see below), whose sum is σ = 650874681600. Its totient is φ = 214696956672.

The previous prime is 431654720401. The next prime is 431654720417. The reversal of 431654720402 is 204027456134.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (431654720401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1790258 + ... + 2017010.

It is an arithmetic number, because the mean of its divisors is an integer number (40679667600).

Almost surely, 2^431654720402 is an apocalyptic number.

431654720402 is a deficient number, since it is larger than the sum of its proper divisors (219219961198).

431654720402 is a wasteful number, since it uses less digits than its factorization.

431654720402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231737.

The product of its (nonzero) digits is 161280, while the sum is 38.

The spelling of 431654720402 in words is "four hundred thirty-one billion, six hundred fifty-four million, seven hundred twenty thousand, four hundred two".