64217422040 has 64 divisors (see below), whose sum is σ = 148081651200. Its totient is φ = 25056150912.

The previous prime is 64217422019. The next prime is 64217422081. The reversal of 64217422040 is 4022471246.

64217422040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64217421988 and 64217422006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139859 + ... + 384701.

It is an arithmetic number, because the mean of its divisors is an integer number (2313775800).

Almost surely, 2^64217422040 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 64217422040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74040825600).

64217422040 is an abundant number, since it is smaller than the sum of its proper divisors (83864229160).

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

64217422040 is a wasteful number, since it uses less digits than its factorization.

64217422040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245016 (or 245012 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

Adding to 64217422040 its reverse (4022471246), we get a palindrome (68239893286).

The spelling of 64217422040 in words is "sixty-four billion, two hundred seventeen million, four hundred twenty-two thousand, forty".