431643826461 has 4 divisors (see below), whose sum is σ = 575525101952. Its totient is φ = 287762550972.

The previous prime is 431643826459. The next prime is 431643826469. The reversal of 431643826461 is 164628346134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 431643826461 - 2¹ = 431643826459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431643826461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431643826469) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 71940637741 + ... + 71940637746.

It is an arithmetic number, because the mean of its divisors is an integer number (143881275488).

Almost surely, 2^431643826461 is an apocalyptic number.

It is an amenable number.

431643826461 is a deficient number, since it is larger than the sum of its proper divisors (143881275491).

431643826461 is a wasteful number, since it uses less digits than its factorization.

431643826461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143881275490.

The product of its digits is 1990656, while the sum is 48.

The spelling of 431643826461 in words is "four hundred thirty-one billion, six hundred forty-three million, eight hundred twenty-six thousand, four hundred sixty-one".