64840073022 has 128 divisors (see below), whose sum is σ = 150498969600. Its totient is φ = 20674113408.

The previous prime is 64840072993. The next prime is 64840073033. The reversal of 64840073022 is 22037004846.

64840073022 is a `hidden beast` number, since 648 + 4 + 0 + 0 + 7 + 3 + 0 + 2 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43721493 + ... + 43722975.

It is an arithmetic number, because the mean of its divisors is an integer number (1175773200).

Almost surely, 2^64840073022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64840073022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75249484800).

64840073022 is an abundant number, since it is smaller than the sum of its proper divisors (85658896578).

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

64840073022 is a wasteful number, since it uses less digits than its factorization.

64840073022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887 (or 1881 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

Adding to 64840073022 its reverse (22037004846), we get a palindrome (86877077868).

The spelling of 64840073022 in words is "sixty-four billion, eight hundred forty million, seventy-three thousand, twenty-two".