641461020 has 48 divisors (see below), whose sum is σ = 1797468288. Its totient is φ = 170925120.

The previous prime is 641461013. The next prime is 641461027. The reversal of 641461020 is 20164146.

It is an interprime number because it is at equal distance from previous prime (641461013) and next prime (641461027).

It is a super-2 number, since 2×641461020² = 822944480358880800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641461027) 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, 94335 + ... + 100905.

It is an arithmetic number, because the mean of its divisors is an integer number (37447256).

Almost surely, 2^641461020 is an apocalyptic number.

641461020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641461020 is an abundant number, since it is smaller than the sum of its proper divisors (1156007268).

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

641461020 is a wasteful number, since it uses less digits than its factorization.

641461020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210 (or 8208 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 641461020 is about 25327.0807634832. The cubic root of 641461020 is about 862.4291426772.

The spelling of 641461020 in words is "six hundred forty-one million, four hundred sixty-one thousand, twenty".