64836699663846 has 256 divisors, whose sum is σ = 155819025146880. Its totient is φ = 17760174981120.

The previous prime is 64836699663833. The next prime is 64836699663847.

It is a happy number.

64836699663846 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64836699663847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2264864985 + ... + 2264893611.

It is an arithmetic number, because the mean of its divisors is an integer number (608668066980).

Almost surely, 2^{64836699663846} is an apocalyptic number.

64836699663846 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 64836699663846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77909512573440).

64836699663846 is an abundant number, since it is smaller than the sum of its proper divisors (90982325483034).

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

64836699663846 is a wasteful number, since it uses less digits than its factorization.

64836699663846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29399.

The product of its digits is 34828517376, while the sum is 84.

The spelling of 64836699663846 in words is "sixty-four trillion, eight hundred thirty-six billion, six hundred ninety-nine million, six hundred sixty-three thousand, eight hundred forty-six".