641768501 has 8 divisors (see below), whose sum is σ = 700312224. Its totient is φ = 583258320.

The previous prime is 641768497. The next prime is 641768509. The reversal of 641768501 is 105867146.

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 641768501 - 2² = 641768497 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 (641768509) 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, 48350 + ... + 60176.

It is an arithmetic number, because the mean of its divisors is an integer number (87539028).

Almost surely, 2^641768501 is an apocalyptic number.

It is an amenable number.

641768501 is a deficient number, since it is larger than the sum of its proper divisors (58543723).

641768501 is a wasteful number, since it uses less digits than its factorization.

641768501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16771.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 641768501 is about 25333.1502383734. The cubic root of 641768501 is about 862.5669209715.

The spelling of 641768501 in words is "six hundred forty-one million, seven hundred sixty-eight thousand, five hundred one".