64891105080 has 192 divisors, whose sum is σ = 210051619200. Its totient is φ = 15992755200.

The previous prime is 64891105063. The next prime is 64891105129. The reversal of 64891105080 is 8050119846.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3824215 + ... + 3841145.

It is an arithmetic number, because the mean of its divisors is an integer number (1094018850).

Almost surely, 2^64891105080 is an apocalyptic number.

64891105080 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 64891105080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105025809600).

64891105080 is an abundant number, since it is smaller than the sum of its proper divisors (145160514120).

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

64891105080 is a wasteful number, since it uses less digits than its factorization.

64891105080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17046 (or 17001 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 64891105080 in words is "sixty-four billion, eight hundred ninety-one million, one hundred five thousand, eighty".