641002653409 has 4 divisors (see below), whose sum is σ = 668872334016. Its totient is φ = 613132972804.

The previous prime is 641002653407. The next prime is 641002653449. The reversal of 641002653409 is 904356200146.

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 a cyclic number.

It is not a de Polignac number, because 641002653409 - 2¹ = 641002653407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641002653407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13934840269 + ... + 13934840314.

It is an arithmetic number, because the mean of its divisors is an integer number (167218083504).

Almost surely, 2^641002653409 is an apocalyptic number.

It is an amenable number.

641002653409 is a deficient number, since it is larger than the sum of its proper divisors (27869680607).

641002653409 is a wasteful number, since it uses less digits than its factorization.

641002653409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27869680606.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 641002653409 in words is "six hundred forty-one billion, two million, six hundred fifty-three thousand, four hundred nine".