64699452864 has 448 divisors, whose sum is σ = 203362560000. Its totient is φ = 20137807872.

The previous prime is 64699452863. The next prime is 64699452887. The reversal of 64699452864 is 46825499646.

64699452864 is a `hidden beast` number, since 6 + 46 + 9 + 9 + 4 + 528 + 64 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64699452863) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 233571894 + ... + 233572170.

Almost surely, 2^64699452864 is an apocalyptic number.

64699452864 is a gapful number since it is divisible by the number (64) 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 64699452864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101681280000).

64699452864 is an abundant number, since it is smaller than the sum of its proper divisors (138663107136).

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

64699452864 is a wasteful number, since it uses less digits than its factorization.

64699452864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 449 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 63.

The spelling of 64699452864 in words is "sixty-four billion, six hundred ninety-nine million, four hundred fifty-two thousand, eight hundred sixty-four".