641446620 has 48 divisors (see below), whose sum is σ = 1820666400. Its totient is φ = 168708096.

The previous prime is 641446613. The next prime is 641446627. The reversal of 641446620 is 26644146.

It is an interprime number because it is at equal distance from previous prime (641446613) and next prime (641446627).

It is a super-2 number, since 2×641446620² = 822907532618848800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641446627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68845 + ... + 77604.

It is an arithmetic number, because the mean of its divisors is an integer number (37930550).

Almost surely, 2^641446620 is an apocalyptic number.

641446620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641446620 is an abundant number, since it is smaller than the sum of its proper divisors (1179219780).

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

641446620 is a wasteful number, since it uses less digits than its factorization.

641446620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146534 (or 146532 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 641446620 is about 25326.7964811975. The cubic root of 641446620 is about 862.4226891426.

Adding to 641446620 its sum of digits (33), we get a triangular number (641446653 = T₃₅₈₁₇).

The spelling of 641446620 in words is "six hundred forty-one million, four hundred forty-six thousand, six hundred twenty".