641602500 has 360 divisors, whose sum is σ = 2373290304. Its totient is φ = 132000000.

The previous prime is 641602463. The next prime is 641602501. The reversal of 641602500 is 5206146.

It is not an unprimeable number, because it can be changed into a prime (641602501) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 6352450 + ... + 6352550.

Almost surely, 2^641602500 is an apocalyptic number.

641602500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641602500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186645152).

641602500 is an abundant number, since it is smaller than the sum of its proper divisors (1731687804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641602500 is a wasteful number, since it uses less digits than its factorization.

641602500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 641602500 is about 25329.8736672728. The cubic root of 641602500 is about 862.4925435188.

Adding to 641602500 its reverse (5206146), we get a palindrome (646808646).

The spelling of 641602500 in words is "six hundred forty-one million, six hundred two thousand, five hundred".