1641726450 has 288 divisors, whose sum is σ = 5550644736. Its totient is φ = 338618880.

The previous prime is 1641726421. The next prime is 1641726451. The reversal of 1641726450 is 546271461.

1641726450 is a `hidden beast` number, since 1 + 6 + 4 + 1 + 7 + 2 + 645 + 0 = 666.

1641726450 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1641726451) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1924224 + ... + 1925076.

It is an arithmetic number, because the mean of its divisors is an integer number (19273072).

Almost surely, 2^1641726450 is an apocalyptic number.

1641726450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641726450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2775322368).

1641726450 is an abundant number, since it is smaller than the sum of its proper divisors (3908918286).

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

1641726450 is a wasteful number, since it uses less digits than its factorization.

1641726450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1641726450 is about 40518.2236777478. The cubic root of 1641726450 is about 1179.6873752876.

The spelling of 1641726450 in words is "one billion, six hundred forty-one million, seven hundred twenty-six thousand, four hundred fifty".