64013328450 has 144 divisors (see below), whose sum is σ = 184451230080. Its totient is φ = 15866547840.

The previous prime is 64013328427. The next prime is 64013328517. The reversal of 64013328450 is 5482331046.

64013328450 is a `hidden beast` number, since 640 + 1 + 3 + 3 + 2 + 8 + 4 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 382519 + ... + 523781.

It is an arithmetic number, because the mean of its divisors is an integer number (1280911320).

Almost surely, 2^64013328450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64013328450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92225615040).

64013328450 is an abundant number, since it is smaller than the sum of its proper divisors (120437901630).

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

64013328450 is a wasteful number, since it uses less digits than its factorization.

64013328450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141353 (or 141345 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 64013328450 its reverse (5482331046), we get a palindrome (69495659496).

The spelling of 64013328450 in words is "sixty-four billion, thirteen million, three hundred twenty-eight thousand, four hundred fifty".