641015040 has 72 divisors (see below), whose sum is σ = 2047254048. Its totient is φ = 170936320.

The previous prime is 641015017. The next prime is 641015057. The reversal of 641015040 is 40510146.

It is a junction number, because it is equal to n+sod(n) for n = 641014998 and 641015016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79626 + ... + 87305.

It is an arithmetic number, because the mean of its divisors is an integer number (28434084).

Almost surely, 2^641015040 is an apocalyptic number.

641015040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641015040 is an abundant number, since it is smaller than the sum of its proper divisors (1406239008).

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

641015040 is a wasteful number, since it uses less digits than its factorization.

641015040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166955 (or 166941 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 641015040 is about 25318.2748227441. The cubic root of 641015040 is about 862.2292264914.

Adding to 641015040 its reverse (40510146), we get a palindrome (681525186).

The spelling of 641015040 in words is "six hundred forty-one million, fifteen thousand, forty".