641719963 has 8 divisors (see below), whose sum is σ = 648720000. Its totient is φ = 634732800.

The previous prime is 641719957. The next prime is 641720011. The reversal of 641719963 is 369917146.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 641719963 - 2¹³ = 641711771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641719943) 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, 123606 + ... + 128692.

It is an arithmetic number, because the mean of its divisors is an integer number (81090000).

Almost surely, 2^641719963 is an apocalyptic number.

641719963 is a deficient number, since it is larger than the sum of its proper divisors (7000037).

641719963 is a wasteful number, since it uses less digits than its factorization.

641719963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437.

The product of its digits is 244944, while the sum is 46.

The square root of 641719963 is about 25332.1922264932. The cubic root of 641719963 is about 862.5451746415.

The spelling of 641719963 in words is "six hundred forty-one million, seven hundred nineteen thousand, nine hundred sixty-three".