431611689402 has 64 divisors (see below), whose sum is σ = 1018168444800. Its totient is φ = 135059385600.

The previous prime is 431611689391. The next prime is 431611689427. The reversal of 431611689402 is 204986116134.

431611689402 is a `hidden beast` number, since 4 + 3 + 161 + 1 + 6 + 89 + 402 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247224 + ... + 961427.

It is an arithmetic number, because the mean of its divisors is an integer number (15908881950).

Almost surely, 2^431611689402 is an apocalyptic number.

431611689402 is an abundant number, since it is smaller than the sum of its proper divisors (586556755398).

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

431611689402 is a wasteful number, since it uses less digits than its factorization.

431611689402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209068 (or 1209062 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 431611689402 in words is "four hundred thirty-one billion, six hundred eleven million, six hundred eighty-nine thousand, four hundred two".