641290146 has 24 divisors (see below), whose sum is σ = 1491981840. Its totient is φ = 183225672.

The previous prime is 641290141. The next prime is 641290157. The reversal of 641290146 is 641092146.

641290146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641290146² = 822506102713402632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641290141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1090336 + ... + 1090923.

It is an arithmetic number, because the mean of its divisors is an integer number (62165910).

Almost surely, 2^641290146 is an apocalyptic number.

641290146 is an abundant number, since it is smaller than the sum of its proper divisors (850691694).

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

641290146 is a wasteful number, since it uses less digits than its factorization.

641290146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181278 (or 2181271 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 641290146 is about 25323.7071930632. The cubic root of 641290146 is about 862.3525571950.

The spelling of 641290146 in words is "six hundred forty-one million, two hundred ninety thousand, one hundred forty-six".