64916889480 has 160 divisors (see below), whose sum is σ = 220354314840. Its totient is φ = 17139686400.

The previous prime is 64916889461. The next prime is 64916889487. The reversal of 64916889480 is 8498861946.

64916889480 is a `hidden beast` number, since 6 + 4 + 91 + 68 + 8 + 9 + 480 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 64899600516 + 17288964 = 254754^2 + 4158^2 .

It is not an unprimeable number, because it can be changed into a prime (64916889487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 228052 + ... + 426428.

Almost surely, 2^64916889480 is an apocalyptic number.

64916889480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64916889480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110177157420).

64916889480 is an abundant number, since it is smaller than the sum of its proper divisors (155437425360).

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

64916889480 is a wasteful number, since it uses less digits than its factorization.

64916889480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198501 (or 198488 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The spelling of 64916889480 in words is "sixty-four billion, nine hundred sixteen million, eight hundred eighty-nine thousand, four hundred eighty".