641413509 has 8 divisors (see below), whose sum is σ = 932965152. Its totient is φ = 388735440.

The previous prime is 641413483. The next prime is 641413511. The reversal of 641413509 is 905314146.

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

It is not a de Polignac number, because 641413509 - 2⁹ = 641412997 is a prime.

It is a super-2 number, since 2×641413509² = 822822579055386162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 19436773 = 641413509 / (6 + 4 + 1 + 4 + 1 + 3 + 5 + 0 + 9).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 641413509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641413709) 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, 9718354 + ... + 9718419.

It is an arithmetic number, because the mean of its divisors is an integer number (116620644).

Almost surely, 2^641413509 is an apocalyptic number.

It is an amenable number.

641413509 is a deficient number, since it is larger than the sum of its proper divisors (291551643).

641413509 is a wasteful number, since it uses less digits than its factorization.

641413509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19436787.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 641413509 is about 25326.1427975126. The cubic root of 641413509 is about 862.4078496802.

The spelling of 641413509 in words is "six hundred forty-one million, four hundred thirteen thousand, five hundred nine".