64434402450 has 288 divisors, whose sum is σ = 198082946880. Its totient is φ = 15442099200.

The previous prime is 64434402427. The next prime is 64434402497. The reversal of 64434402450 is 5420443446.

64434402450 is a `hidden beast` number, since 644 + 3 + 4 + 4 + 0 + 2 + 4 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11892142 + ... + 11897558.

It is an arithmetic number, because the mean of its divisors is an integer number (687788010).

Almost surely, 2^64434402450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64434402450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99041473440).

64434402450 is an abundant number, since it is smaller than the sum of its proper divisors (133648544430).

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

64434402450 is a wasteful number, since it uses less digits than its factorization.

64434402450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5544 (or 5527 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 36.

Adding to 64434402450 its reverse (5420443446), we get a palindrome (69854845896).

The spelling of 64434402450 in words is "sixty-four billion, four hundred thirty-four million, four hundred two thousand, four hundred fifty".