431981641729 has 8 divisors (see below), whose sum is σ = 473328705888. Its totient is φ = 390980578560.

The previous prime is 431981641727. The next prime is 431981641733. The reversal of 431981641729 is 927146189134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 431981641729 - 2¹ = 431981641727 is a prime.

It is a super-2 number, since 2×431981641729² (a number of 24 digits) contains 22 as substring.

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 431981641729.

It is not an unprimeable number, because it can be changed into a prime (431981641727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86497632 + ... + 86502625.

It is an arithmetic number, because the mean of its divisors is an integer number (59166088236).

Almost surely, 2^431981641729 is an apocalyptic number.

It is an amenable number.

431981641729 is a deficient number, since it is larger than the sum of its proper divisors (41347064159).

431981641729 is a wasteful number, since it uses less digits than its factorization.

431981641729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173000495.

The product of its digits is 2612736, while the sum is 55.

The spelling of 431981641729 in words is "four hundred thirty-one billion, nine hundred eighty-one million, six hundred forty-one thousand, seven hundred twenty-nine".