641475450 has 480 divisors, whose sum is σ = 2372312448. Its totient is φ = 125452800.

The previous prime is 641475437. The next prime is 641475479. The reversal of 641475450 is 54574146.

641475450 is a `hidden beast` number, since 64 + 147 + 5 + 450 = 666.

641475450 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 2×641475450² = 822981505905405000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 37733842 + ... + 37733858.

Almost surely, 2^641475450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641475450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186156224).

641475450 is an abundant number, since it is smaller than the sum of its proper divisors (1730836998).

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

641475450 is a wasteful number, since it uses less digits than its factorization.

641475450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 641475450 is about 25327.3656348227. The cubic root of 641475450 is about 862.4356095597.

The spelling of 641475450 in words is "six hundred forty-one million, four hundred seventy-five thousand, four hundred fifty".