64903367718 has 128 divisors (see below), whose sum is σ = 175047091200. Its totient is φ = 17412143616.

The previous prime is 64903367707. The next prime is 64903367731. The reversal of 64903367718 is 81776330946.

It is a super-2 number, since 2×64903367718² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 771580 + ... + 851552.

It is an arithmetic number, because the mean of its divisors is an integer number (1367555400).

Almost surely, 2^64903367718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64903367718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87523545600).

64903367718 is an abundant number, since it is smaller than the sum of its proper divisors (110143723482).

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

64903367718 is a wasteful number, since it uses less digits than its factorization.

64903367718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80123 (or 80117 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 64903367718 in words is "sixty-four billion, nine hundred three million, three hundred sixty-seven thousand, seven hundred eighteen".