641609101727 has 8 divisors (see below), whose sum is σ = 703804260432. Its totient is φ = 580058452800.

The previous prime is 641609101709. The next prime is 641609101753. The reversal of 641609101727 is 727101906146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641609101727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641609101327) 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, 161125358 + ... + 161129339.

It is an arithmetic number, because the mean of its divisors is an integer number (87975532554).

Almost surely, 2^641609101727 is an apocalyptic number.

641609101727 is a deficient number, since it is larger than the sum of its proper divisors (62195158705).

641609101727 is a wasteful number, since it uses less digits than its factorization.

641609101727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322254889.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 641609101727 in words is "six hundred forty-one billion, six hundred nine million, one hundred one thousand, seven hundred twenty-seven".