641503336 has 32 divisors (see below), whose sum is σ = 1275194880. Its totient is φ = 302011200.

The previous prime is 641503307. The next prime is 641503337. The reversal of 641503336 is 633305146.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 641503298 and 641503307.

It is not an unprimeable number, because it can be changed into a prime (641503337) 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, 25780 + ... + 44131.

It is an arithmetic number, because the mean of its divisors is an integer number (39849840).

Almost surely, 2^641503336 is an apocalyptic number.

It is an amenable number.

641503336 is a deficient number, since it is larger than the sum of its proper divisors (633691544).

641503336 is a wasteful number, since it uses less digits than its factorization.

641503336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69985 (or 69981 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 641503336 is about 25327.9161401012. The cubic root of 641503336 is about 862.4481065467.

The spelling of 641503336 in words is "six hundred forty-one million, five hundred three thousand, three hundred thirty-six".