64810649484 has 108 divisors (see below), whose sum is σ = 190705242000. Its totient is φ = 18504593856.

The previous prime is 64810649473. The next prime is 64810649531. The reversal of 64810649484 is 48494601846.

64810649484 is a `hidden beast` number, since 6 + 48 + 106 + 494 + 8 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 64810649484.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2720577 + ... + 2744295.

Almost surely, 2^64810649484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64810649484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95352621000).

64810649484 is an abundant number, since it is smaller than the sum of its proper divisors (125894592516).

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

64810649484 is a wasteful number, since it uses less digits than its factorization.

64810649484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25292 (or 25280 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 54.

The spelling of 64810649484 in words is "sixty-four billion, eight hundred ten million, six hundred forty-nine thousand, four hundred eighty-four".