645641232411 has 16 divisors (see below), whose sum is σ = 985327200000. Its totient is φ = 368377994208.

The previous prime is 645641232389. The next prime is 645641232419. The reversal of 645641232411 is 114232146546.

It is not a de Polignac number, because 645641232411 - 2⁶ = 645641232347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645641232411.

It is not an unprimeable number, because it can be changed into a prime (645641232419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23313036 + ... + 23340713.

It is an arithmetic number, because the mean of its divisors is an integer number (61582950000).

Almost surely, 2^645641232411 is an apocalyptic number.

645641232411 is a deficient number, since it is larger than the sum of its proper divisors (339685967589).

645641232411 is a wasteful number, since it uses less digits than its factorization.

645641232411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46654418.

The product of its digits is 138240, while the sum is 39.

Adding to 645641232411 its reverse (114232146546), we get a palindrome (759873378957).

The spelling of 645641232411 in words is "six hundred forty-five billion, six hundred forty-one million, two hundred thirty-two thousand, four hundred eleven".