64220940168 has 192 divisors, whose sum is σ = 204032001600. Its totient is φ = 16657159680.

The previous prime is 64220940127. The next prime is 64220940181. The reversal of 64220940168 is 86104902246.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10306878 + ... + 10313106.

It is an arithmetic number, because the mean of its divisors is an integer number (1062666675).

Almost surely, 2^64220940168 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 64220940168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102016000800).

64220940168 is an abundant number, since it is smaller than the sum of its proper divisors (139811061432).

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

64220940168 is a wasteful number, since it uses less digits than its factorization.

64220940168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7060 (or 7049 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 64220940168 in words is "sixty-four billion, two hundred twenty million, nine hundred forty thousand, one hundred sixty-eight".