641654311 has 4 divisors (see below), whose sum is σ = 648864000. Its totient is φ = 634444624.

The previous prime is 641654309. The next prime is 641654357. The reversal of 641654311 is 113456146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641654311 - 2¹ = 641654309 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 (641654371) 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, 3604711 + ... + 3604888.

It is an arithmetic number, because the mean of its divisors is an integer number (162216000).

Almost surely, 2^641654311 is an apocalyptic number.

641654311 is a deficient number, since it is larger than the sum of its proper divisors (7209689).

641654311 is an equidigital number, since it uses as much as digits as its factorization.

641654311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7209688.

The product of its digits is 8640, while the sum is 31.

The square root of 641654311 is about 25330.8963718223. The cubic root of 641654311 is about 862.5157590343.

The spelling of 641654311 in words is "six hundred forty-one million, six hundred fifty-four thousand, three hundred eleven".