1641426865 has 24 divisors (see below), whose sum is σ = 2138306688. Its totient is φ = 1209049920.

The previous prime is 1641426859. The next prime is 1641426869. The reversal of 1641426865 is 5686241461.

1641426865 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-1641426865 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641426869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361942 + ... + 366448.

It is an arithmetic number, because the mean of its divisors is an integer number (89096112).

Almost surely, 2^1641426865 is an apocalyptic number.

It is an amenable number.

1641426865 is a deficient number, since it is larger than the sum of its proper divisors (496879823).

1641426865 is a wasteful number, since it uses less digits than its factorization.

1641426865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4969 (or 4956 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 1641426865 is about 40514.5265923224. The cubic root of 1641426865 is about 1179.6156138112.

The spelling of 1641426865 in words is "one billion, six hundred forty-one million, four hundred twenty-six thousand, eight hundred sixty-five".